How much to replace fuel pressure regulator?
06-26-2009, 02:05 AM
#52
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Re: How much to replace fuel pressure regulator?
I don't have a map sensor, but I DO believe I know whats wrong with your fuel pressure gauge. If its meant to be on there permanent which I believe it is, you need to decore the Schrader valve. The schrader valve is the exact thing as a tire valve stem. Go to WalMart and look in the "flat tire repair" section and they'll have the de-core-der. Its a little stick you stick inside the vavle and twist and it takes the core out... the core is just threaded in... If you don't know what it looks like, find the "Green Slime" stuff used to repair flat tires. The tip of those is a stem de-core-der...
06-26-2009, 03:19 AM
#53
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Re: How much to replace fuel pressure regulator?
OHHHHH okay i know exactly what that it. Im a bike tech at a sporting goods store. I didnt think of that. I sat there and was like hmmm.....theres no way this thing will push down on the actual valve. It also gave me some other thing i thing to screw into it. I think i got it. hahahaha.
06-26-2009, 12:45 PM
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Re: How much to replace fuel pressure regulator?
ive had todo it twice to my formula. takes me 45 mins tops. not hard at all
06-26-2009, 02:16 PM
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Re: How much to replace fuel pressure regulator?
haha. cool. Let us know if everything works out great...
06-28-2009, 03:53 AM
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Re: How much to replace fuel pressure regulator?
So everything is tip top shape. i don't smell or see any gasoline at all, so everything then seems good to me heres my pics from my swap.
06-28-2009, 12:26 PM
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Re: How much to replace fuel pressure regulator?
Hey O.P its nice to have that extra $4-500 in your pocket instead of a shops isn't?
haha
06-29-2009, 12:16 AM
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Re: How much to replace fuel pressure regulator?
Well im still curious about my runner gaskets? Do i need new ones since i just got my motor rebuilt or should i say F*** it and buy new ones anyways. As far as the FPR goes, I went ahead and ordered the Holley Adjustable Fuel Pressure Regulator off of Summit.com. (http://www.summitracing.com/parts/HLY-512-501/). Will this work? Anyone had any luck with it so far?
adjustable regulators are not legal for any vehicle that operate on the highways - off road use only.
so use it if you want but dont advertise on a web site you are breaking the law.
06-29-2009, 01:55 AM
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Re: How much to replace fuel pressure regulator?
man, California sucks... I'm glad I don't live there anymore...
06-29-2009, 03:23 PM
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Re: How much to replace fuel pressure regulator?
Wow Cali sucks. I wish it would just fall into the ocean already or we could give it to mexico.
06-29-2009, 11:11 PM
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Re: How much to replace fuel pressure regulator?
Hold the phone, TPIS fuel pressure regulator has a carb eo number for their regulator. I don't work for them and it isn't very well known but I could get you that eo number if you want it. This way you can be assured that it is legal.
06-30-2009, 01:52 AM
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Re: How much to replace fuel pressure regulator?
Honestly, I think if you keep the fuel pressure at stock (or even a tad lower) at emissions testing, I think you should be able to get away with it, specially since the afpr is mostly hidden under the plenum...
06-30-2009, 03:43 AM
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Re: How much to replace fuel pressure regulator?
yeah i mean i hav it running at 43 PSI. and if i fail the emissions test, ill just lower the fuel pressure again i guess.
06-30-2009, 07:07 AM
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Re: How much to replace fuel pressure regulator?
I just turn my timing back some before I test it passes everytime.
06-30-2009, 08:55 AM
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Re: How much to replace fuel pressure regulator?
that labor guide is what you charge insurance companies, and its always off by 2/3rds. i have never seen a project take as long as the labor guide says - unless you stop for multiple beer breaks.
06-30-2009, 09:03 AM
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Re: How much to replace fuel pressure regulator?
that would be great if you have it. but it may be an old carb number and carb keeps changing the rules. what was legal in 2008 for cats is not legal in 2009.
but i would like to see that.
the reason they dont want to use an adjustable regulator is so you cant change the pressure and make it appear to be legal when it isn't.
and i like cal. been here all my life and traveled all over the world and best place to live is here, despite the smog *****.
but i would like to see that.
the reason they dont want to use an adjustable regulator is so you cant change the pressure and make it appear to be legal when it isn't.
and i like cal. been here all my life and traveled all over the world and best place to live is here, despite the smog *****.
06-30-2009, 09:28 AM
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Re: How much to replace fuel pressure regulator?
hey 3rdgen - did you use the pressure gage to do the setup and then you take it off so that all that shows if the regulator? that might get past the visual. and did the bike core puller work?
06-30-2009, 01:27 PM
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Re: How much to replace fuel pressure regulator?
yeah, I believe less fuel pressure=less smog. I don't mean run super lean, but just a tad and pull back the timing if you know how aswell...
06-30-2009, 01:35 PM
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Re: How much to replace fuel pressure regulator?
Yeah i actually found a metal bike core puller at work and pulled the schrader core, then just put the guage on and then set the pressure. I took it off when i was done because of fear of leaking.
06-30-2009, 02:59 PM
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Re: How much to replace fuel pressure regulator?
well it looks good from here and without the guage on it you might get past the smog *****.
looks nice and clean too.
how long did it take once you got down to putting the new one on and then tuning it?
tony
looks nice and clean too.
how long did it take once you got down to putting the new one on and then tuning it?
tony
07-01-2009, 03:35 AM
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Re: How much to replace fuel pressure regulator?
it only took me about an hour after i got it on and to tune it. Getting the core out and making sure there were no leaks was a huge thing before i started it. But it was a fun little project.
07-28-2009, 04:29 PM
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Re: How much to replace fuel pressure regulator?
TPI ADJUSTABLE FUEL PRESSURE REGULATOR KIT
P/N 512-501
Installation Instructions
WARNING! THESE INSTRUCTIONS MUST BE READ AND FULLY UNDERSTOOD BEFORE BEGINNING THE INSTALLATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN POOR PERFORMANCE, VEHICLE DAMAGE, PERSONAL INJURY, OR DEATH.
IF THESE INSTRUCTIONS ARE NOT FULLY UNDERSTOOD, INSTALLATION SHOULD NOT BE ATTEMPTED. PLEASE CONSULT
HOLLEY TECH SERVICE OR A QUALIFIED MECHANIC.
INTRODUCTION:
Holley Performance Products cannot and will not be responsible for any alleged or actual engine or other damage, or other conditions resulting from
misapplication of the fuel pressure regulators described herein. However, it is our intent to provide the best possible products for our customer; products
that perform properly and satisfy your expectations. Should you need information or parts assistance, please contact our Technical Service Department
at 1-270-781-9741, Monday through Friday, 7 a.m. to 5:00 p.m. Central Time. Please have the part number of the product you purchased when you call.
KIT CONTENTS
• Adjustment **** • Vacuum Fitting (attached to Housing) • Regulator Spring
• Regulator Housing • Spring Washer • Diaphragm
ADDITIONAL PARTS AND TOOLS REQUIRED
• T10 Tamperproof Torx Bit • 3/8" Drive Socket Set
• Plenum to Intake Runner Gaskets GM P/N 10174951 • Hammer
FUEL PRESSURE REGULATOR INSTALLATION:
The fuel pressure regulator in this instruction sheet is designed to be an adjustable replacement for the stock O.E. regulator. The adjustable fuel
pressure regulator is used mainly for high performance applications. A fuel pressure gauge must be purchased for setting the fuel pressure. Install the
fuel pressure gauge according to the manufacturer’s recommendation. The Holley TPI adjustable fuel pressure regulator kit will reuse the torx screws
and base. DO NOT discard or damage these items during disassembly. Use Figure 1 as a guide for assembling the kit. It will also be necessary to
purchase new Plenum to intake runner gaskets GM P/N 10174951, for this installation.
WARNING! Always use a fuel pressure gauge when adjusting the fuel pressure. Excessive fuel pressure may effect performance or damage
the fuel system.
WARNING! Wipe up any spilled fuel after the installation has been completed. Spilled fuel can ignite on a hot engine, causing a fire and/or
explosion, which may result in property damage, serious injury, and/or death.
1. Remove the gas cap from the fuel tank and pull the fuel pump fuse from the fuse block located under the hood. Now try to start the motor. This will
let the fuel pressure drop, preventing excess fuel spillage when removing the regulator cover.
2. Disconnect the battery.
3. Remove the vacuum lines from the rear of the plenum, noting the locations. The power brake line is on the left rear of the plenum and the two
smaller vacuum lines are on the right rear. Disconnect the two water lines from the under side of the throttle body.
4. Remove the 8 bolts that hold the plenum to the intake runners. With a rubber mallet tap lightly on the plenum until it is loose. Lift the plenum up
and disconnect the electrical connector. Set plenum aside.
5. To remove the regulator cover on the O.E. regulator, use a T10 Tamperproof Torx bit. DO NOT discard the screws.
6. Remove the regulator cover, regulator spring, and diaphragm.
7. To ease the installation of the Holley fuel pressure kit, remove the adjustable **** from the regulator cover. Place the spring washer inside the
Holley regulator cover, then the spring, and finally the diaphragm. It is very important for the diaphragm to be installed as shown in Figure 1.
Figure 1
8. Place the Holley regulator assembly over the regulator base, aligning the screw holes on the base of the regulator, the diaphragm and the cover.
Tighten cover down using the 6 torx screws removed earlier.
9. Loosely screw the adjustment **** into the top of the regulator housing.
10. To finish reverse steps 1 - 6, using new gaskets between the runners to plenum surfaces.
11. Refill to the correct coolant level.
12. Once everything is back together, turn the key to the run position and have somebody watch for fuel leaks. If no leaks are present, start the car.
13. A good starting point for the fuel pressure is 47 psi. However, you may find your particular combination to perform best above ore below this
number. Pressure must be set with the regulator vacuum hose removed. Turn the **** clockwise to raise pressure and counter-clockwise to lower
pressure. The adjustment range for this regulator is from 30 to 65 psi.
Copyright
P/N 512-501
Installation Instructions
WARNING! THESE INSTRUCTIONS MUST BE READ AND FULLY UNDERSTOOD BEFORE BEGINNING THE INSTALLATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN POOR PERFORMANCE, VEHICLE DAMAGE, PERSONAL INJURY, OR DEATH.
IF THESE INSTRUCTIONS ARE NOT FULLY UNDERSTOOD, INSTALLATION SHOULD NOT BE ATTEMPTED. PLEASE CONSULT
HOLLEY TECH SERVICE OR A QUALIFIED MECHANIC.
INTRODUCTION:
Holley Performance Products cannot and will not be responsible for any alleged or actual engine or other damage, or other conditions resulting from
misapplication of the fuel pressure regulators described herein. However, it is our intent to provide the best possible products for our customer; products
that perform properly and satisfy your expectations. Should you need information or parts assistance, please contact our Technical Service Department
at 1-270-781-9741, Monday through Friday, 7 a.m. to 5:00 p.m. Central Time. Please have the part number of the product you purchased when you call.
KIT CONTENTS
• Adjustment **** • Vacuum Fitting (attached to Housing) • Regulator Spring
• Regulator Housing • Spring Washer • Diaphragm
ADDITIONAL PARTS AND TOOLS REQUIRED
• T10 Tamperproof Torx Bit • 3/8" Drive Socket Set
• Plenum to Intake Runner Gaskets GM P/N 10174951 • Hammer
FUEL PRESSURE REGULATOR INSTALLATION:
The fuel pressure regulator in this instruction sheet is designed to be an adjustable replacement for the stock O.E. regulator. The adjustable fuel
pressure regulator is used mainly for high performance applications. A fuel pressure gauge must be purchased for setting the fuel pressure. Install the
fuel pressure gauge according to the manufacturer’s recommendation. The Holley TPI adjustable fuel pressure regulator kit will reuse the torx screws
and base. DO NOT discard or damage these items during disassembly. Use Figure 1 as a guide for assembling the kit. It will also be necessary to
purchase new Plenum to intake runner gaskets GM P/N 10174951, for this installation.
WARNING! Always use a fuel pressure gauge when adjusting the fuel pressure. Excessive fuel pressure may effect performance or damage
the fuel system.
WARNING! Wipe up any spilled fuel after the installation has been completed. Spilled fuel can ignite on a hot engine, causing a fire and/or
explosion, which may result in property damage, serious injury, and/or death.
1. Remove the gas cap from the fuel tank and pull the fuel pump fuse from the fuse block located under the hood. Now try to start the motor. This will
let the fuel pressure drop, preventing excess fuel spillage when removing the regulator cover.
2. Disconnect the battery.
3. Remove the vacuum lines from the rear of the plenum, noting the locations. The power brake line is on the left rear of the plenum and the two
smaller vacuum lines are on the right rear. Disconnect the two water lines from the under side of the throttle body.
4. Remove the 8 bolts that hold the plenum to the intake runners. With a rubber mallet tap lightly on the plenum until it is loose. Lift the plenum up
and disconnect the electrical connector. Set plenum aside.
5. To remove the regulator cover on the O.E. regulator, use a T10 Tamperproof Torx bit. DO NOT discard the screws.
6. Remove the regulator cover, regulator spring, and diaphragm.
7. To ease the installation of the Holley fuel pressure kit, remove the adjustable **** from the regulator cover. Place the spring washer inside the
Holley regulator cover, then the spring, and finally the diaphragm. It is very important for the diaphragm to be installed as shown in Figure 1.
Figure 1
8. Place the Holley regulator assembly over the regulator base, aligning the screw holes on the base of the regulator, the diaphragm and the cover.
Tighten cover down using the 6 torx screws removed earlier.
9. Loosely screw the adjustment **** into the top of the regulator housing.
10. To finish reverse steps 1 - 6, using new gaskets between the runners to plenum surfaces.
11. Refill to the correct coolant level.
12. Once everything is back together, turn the key to the run position and have somebody watch for fuel leaks. If no leaks are present, start the car.
13. A good starting point for the fuel pressure is 47 psi. However, you may find your particular combination to perform best above ore below this
number. Pressure must be set with the regulator vacuum hose removed. Turn the **** clockwise to raise pressure and counter-clockwise to lower
pressure. The adjustment range for this regulator is from 30 to 65 psi.
Copyright
Just more info to help peeps!
07-28-2009, 04:31 PM
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Re: How much to replace fuel pressure regulator?
BBK Adjustable Fuel Pressure Regulator
For Tuned Port Injection GM Engines
Part # 1714
INS-060
This regulator is designed for use on Tuned Port Injection equipped GM engines only. Please read these instructions
before starting your installation.
We highly recommend having a service manual for your vehicle at hand before you start the installation. This will assist
you in removing specific items along with giving you the necessary torque settings for reassembly.
The fuel flow capabilities of Tuned Port Injection (TPI) systems is directly effected by fuel pressure. Changing the fuel
pressure will allow you to fine tune a particular engine combination.
Step 1 With a fuel injection pressure guage installed, turn the ignition key on and off several times, without starting the
engine and record the stock fuel pressure.
Step 2 With the engine cold, carefully relieve the pressure from the fuel rail. This can be done with one of the many
tools designed specifically for this purpose that attach to the Schrader valve that is mounted to the fuel rail. Use
caution to reduce the chance of fire or fuel spraying.
If you do not have a pressure relief tool, you may perform the following procedure. Remove the “Fuel Pump” fuse from
the fuse panel. Start the engine and let it run until the fuel in the lines is consumed. Crank the engine for 3 seconds more to
relieve any remaining pressure. Turn the ignition off and replace the fuse in the panel. Allow the engine to cool.
Step 3 Partially drain the radiator to allow you to remove the coolant hoses from the plenum. Mark all of the various
vacuum hoses and wire harness connectors and where they connect to the plenum. Disconnect all of the wires
and hoses attached to the plenum. Remove all of the linkages and disconnect the air duct from the throttle body.
Step 4 Remove the 8 bolts that attach the upper plenum to the runners. Then loosen (do not remove) the runner to base
manifold bolts on one side only. In most applications, the passenger side bolts are the easiest to access.
Step 5 Tap on the main plenum housing with a rubber hammer until it is loose. Once loose, move it to one side to allow
access to the pressure regulator top.
Step 6 Using the supplied Torx socket, loosen the stock regulator cover bolts and lift the cover straight up. Make sure
the diaphragm and spring remain in place. Keep track of the bolts and other components.
Step 7 Place the spacer washer on top of the spring and install the new cover with the vacuum fitting facing in the same
direction as the stock unit. Torque the bolts into position. We recommend using a thread locking compound on
the bolts for extra protection.
Step 8 Install the pressure adjustment screw until it just contacts the spacer washer. This will yield near stock pressure.
Step 9 Reassemble the upper plenum and runners using the new gaskets provided. Make sure you torque these bolts
into place along with the lower bolts you loosened earlier. Reinstall any components you removed previously and
refill the coolant system.
Step 10 Once everything is replaced, turn the key on and off several times, without starting the engine and verify the
pressure figure you recorded in step 1. Adjust the regulator as necessary.
Step 11 Using the stock pressure as your baseline, try increasing the pressure initially 6 pounds. You should continue to
increase the pressure 2 pounds at a time as long as you can feel an increase on upper rpm power without a
decrease in idle characteristics or low end driveability. Once you have obtained maximum performance, we
recommend you try decreasing the pressure 2 pounds at a time until you notice the performance
dropping. This should yield best overall driveability and performance.
I N S T A L L A T I O N I N S T R U C T I O N S
w w w . B B K P E R F O R M A N C E . c o m
IMPORTANT—All
For Tuned Port Injection GM Engines
Part # 1714
INS-060
This regulator is designed for use on Tuned Port Injection equipped GM engines only. Please read these instructions
before starting your installation.
We highly recommend having a service manual for your vehicle at hand before you start the installation. This will assist
you in removing specific items along with giving you the necessary torque settings for reassembly.
The fuel flow capabilities of Tuned Port Injection (TPI) systems is directly effected by fuel pressure. Changing the fuel
pressure will allow you to fine tune a particular engine combination.
Step 1 With a fuel injection pressure guage installed, turn the ignition key on and off several times, without starting the
engine and record the stock fuel pressure.
Step 2 With the engine cold, carefully relieve the pressure from the fuel rail. This can be done with one of the many
tools designed specifically for this purpose that attach to the Schrader valve that is mounted to the fuel rail. Use
caution to reduce the chance of fire or fuel spraying.
If you do not have a pressure relief tool, you may perform the following procedure. Remove the “Fuel Pump” fuse from
the fuse panel. Start the engine and let it run until the fuel in the lines is consumed. Crank the engine for 3 seconds more to
relieve any remaining pressure. Turn the ignition off and replace the fuse in the panel. Allow the engine to cool.
Step 3 Partially drain the radiator to allow you to remove the coolant hoses from the plenum. Mark all of the various
vacuum hoses and wire harness connectors and where they connect to the plenum. Disconnect all of the wires
and hoses attached to the plenum. Remove all of the linkages and disconnect the air duct from the throttle body.
Step 4 Remove the 8 bolts that attach the upper plenum to the runners. Then loosen (do not remove) the runner to base
manifold bolts on one side only. In most applications, the passenger side bolts are the easiest to access.
Step 5 Tap on the main plenum housing with a rubber hammer until it is loose. Once loose, move it to one side to allow
access to the pressure regulator top.
Step 6 Using the supplied Torx socket, loosen the stock regulator cover bolts and lift the cover straight up. Make sure
the diaphragm and spring remain in place. Keep track of the bolts and other components.
Step 7 Place the spacer washer on top of the spring and install the new cover with the vacuum fitting facing in the same
direction as the stock unit. Torque the bolts into position. We recommend using a thread locking compound on
the bolts for extra protection.
Step 8 Install the pressure adjustment screw until it just contacts the spacer washer. This will yield near stock pressure.
Step 9 Reassemble the upper plenum and runners using the new gaskets provided. Make sure you torque these bolts
into place along with the lower bolts you loosened earlier. Reinstall any components you removed previously and
refill the coolant system.
Step 10 Once everything is replaced, turn the key on and off several times, without starting the engine and verify the
pressure figure you recorded in step 1. Adjust the regulator as necessary.
Step 11 Using the stock pressure as your baseline, try increasing the pressure initially 6 pounds. You should continue to
increase the pressure 2 pounds at a time as long as you can feel an increase on upper rpm power without a
decrease in idle characteristics or low end driveability. Once you have obtained maximum performance, we
recommend you try decreasing the pressure 2 pounds at a time until you notice the performance
dropping. This should yield best overall driveability and performance.
I N S T A L L A T I O N I N S T R U C T I O N S
w w w . B B K P E R F O R M A N C E . c o m
IMPORTANT—All
http://www.jegs.com/InstallationInst...9/129-1714.pdf
07-31-2009, 03:45 AM
#80
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Re: How much to replace fuel pressure regulator?
Dude i just read this and the EO number for my fuel pressure regulator would be great!! Better safe than sorry right?
07-31-2009, 07:09 AM
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Re: How much to replace fuel pressure regulator?
I am quoting this straight from TPIS. If there is any questions, consult with TPIS, I don't work for them, I just buy all my stuff from them.
"Our Adjustable Fuel Pressure Regulator is California Air Resources Board approved, EO #235. There is a competitor of ours that does not understand the effects of fuel pressure. If it were harmful to raise the pressure, that is clog the catalytic converter or raise emission, we would not have been granted an EO number."
There, I'm done. I hope this helps. I believe that most of their products have an EO number but I don't give a flying foo foo about that, I'm in IL. I buy their stuff because of the quality and the customer service that is better than everywhere else I've been to.
"Our Adjustable Fuel Pressure Regulator is California Air Resources Board approved, EO #235. There is a competitor of ours that does not understand the effects of fuel pressure. If it were harmful to raise the pressure, that is clog the catalytic converter or raise emission, we would not have been granted an EO number."
There, I'm done. I hope this helps. I believe that most of their products have an EO number but I don't give a flying foo foo about that, I'm in IL. I buy their stuff because of the quality and the customer service that is better than everywhere else I've been to.
08-01-2009, 01:09 PM
#82
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Transmission: 700r4
Axle/Gears: stock
Re: How much to replace fuel pressure regulator?
yes it really helped me. im going to look that one up to make sure it is a carb number for our cars but thanks for all the work in looking.
tony
well here it is http://arb.ca.gov/msprog/aftermkt/devices/eo/D-235.pdf. but the number is d-235.
right on man!
tony
well here it is http://arb.ca.gov/msprog/aftermkt/devices/eo/D-235.pdf. but the number is d-235.
right on man!
Last edited by tony_cogliandro; 08-01-2009 at 01:32 PM.
08-02-2009, 10:47 AM
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Engine: 350 + 30 over, 400 crank
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Axle/Gears: not a one tire fire, thank god!
Re: How much to replace fuel pressure regulator?
My bad, I got the info right out of the TPIS insider hints book. Glad that I could help but remember also that it doesn't come with any kind of EO sticker, I ordered one, I would know, but you could take a copy of the receipt and a copy of that link and you should be good.
08-02-2009, 01:51 PM
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Car: 1987 Trans Am
Engine: 355ci L98 soon to be turbo'd
Transmission: 700R4
Axle/Gears: 2.73 posi
Re: How much to replace fuel pressure regulator?
man, I feel sorry for you guys in California. So much unnecessary car stress!
08-06-2009, 03:42 PM
#85
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Car: 1990
Engine: 305
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Re: How much to replace fuel pressure regulator?
My bad, I got the info right out of the TPIS insider hints book. Glad that I could help but remember also that it doesn't come with any kind of EO sticker, I ordered one, I would know, but you could take a copy of the receipt and a copy of that link and you should be good.
08-20-2009, 11:38 PM
#88
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Re: How much to replace fuel pressure regulator?
all4u has the right way and after i read his info and looked it up he was dead on.
if you are in california tpis has an adjustable fuel pressure regulator that is CARB approved for us here in cal. if you use the tpis you can adjust it and dont need all the other stuff because you are not trying to hide the fact it is adjustable.
i have to admit that everytime i said you cant use an adjustable fuel pressure regulator IN CALIFORNIA i was dead WRONG.
if you are in california tpis has an adjustable fuel pressure regulator that is CARB approved for us here in cal. if you use the tpis you can adjust it and dont need all the other stuff because you are not trying to hide the fact it is adjustable.
i have to admit that everytime i said you cant use an adjustable fuel pressure regulator IN CALIFORNIA i was dead WRONG.
08-21-2009, 04:16 PM
#90
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Re: How much to replace fuel pressure regulator?
It came with the guage. I ordered the Accel fuel pressure guage off jegs here:
http://www.jegs.com/i/DFI/310/74726/10002/-1
http://www.jegs.com/i/DFI/310/74726/10002/-1
08-22-2009, 09:49 AM
#91
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Car: Firechicken
Engine: 350 + 30 over, 400 crank
Transmission: autotragic, stalled
Axle/Gears: not a one tire fire, thank god!
Re: How much to replace fuel pressure regulator?
I wanted to respond real quick on here. Tony Cogliandro, don't beat yourself up on you were wrong about the AFPR because it was a "known fact" that it was not emissions compliant. So much for "known facts" or some crap like that.
Next, I've been running the TPIS AFPR with a racetronix pump with hotwire kit for 6 months and everything is great. As a test of durability, I put in the new pump without backing off the regulator and when I first fired up the car, pressure was over 130 PSI! I quickly turned off the car and backed it down and got it to 60 PSI and kept it running till I backed it to 47 PSI. I expected to blow the regulator diaphram sky high for the brief 30 seconds the car was up to 130 PSI but all that happened was a lot of smoke and running rough, no broken regulator. My point is, that regulator takes a beating like a red headed step child.
Lastly, don't be afraid to work on the top of the engine, there isn't anything you are going to mess up. It is simple to pull off the plenum, or in my case, half the plenum. and replace the regulator and block the EGR. It's easy, don't be afraid to work on it. It's a small block chevy for pete's sake, there are literally a billion people that can help you with whatever you may mess up.
Next, I've been running the TPIS AFPR with a racetronix pump with hotwire kit for 6 months and everything is great. As a test of durability, I put in the new pump without backing off the regulator and when I first fired up the car, pressure was over 130 PSI! I quickly turned off the car and backed it down and got it to 60 PSI and kept it running till I backed it to 47 PSI. I expected to blow the regulator diaphram sky high for the brief 30 seconds the car was up to 130 PSI but all that happened was a lot of smoke and running rough, no broken regulator. My point is, that regulator takes a beating like a red headed step child.
Lastly, don't be afraid to work on the top of the engine, there isn't anything you are going to mess up. It is simple to pull off the plenum, or in my case, half the plenum. and replace the regulator and block the EGR. It's easy, don't be afraid to work on it. It's a small block chevy for pete's sake, there are literally a billion people that can help you with whatever you may mess up.
11-05-2009, 06:01 AM
#92
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Re: How much to replace fuel pressure regulator?
Okay so I'm back to my thread that I started ages ago. My car was running rough again so I went and took it too the chevy dealer and guess what, my fuel pressure regulator was busted!! Fantastic. Could I walk into an Kragen or autozone and just buy a new diaphragm? My question is I'm running a Holley adj and I wanna make sure it'll work. And what do you think might have popped it? It's only been like 3-4 months since I last fixed it. Input much appreciated guys.
11-05-2009, 07:43 AM
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Car: Firechicken
Engine: 350 + 30 over, 400 crank
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Re: How much to replace fuel pressure regulator?
Ok, not a big deal. The holley is only like a 1 layer diaphragm and is the same as you will get at an auto parts store. It is also very thin and flexible. The one from TPIS is a two or three layer (I forget) and is flexible but thicker and stronger.
Your best option in my opinion would be to order a diaphragm from TPIS, you don't have to order the whole regulator, just the diaphragm.
As far as breaking it, I broke my stock one when I made a homeade regulator and bumped up the fuel pressure, it ripped. I only had it at 46 psi. The TPIS I've had as high as 130 psi (don't ask) and it didn't rip. TPIs makes parts that are overkill so if you F-up, you don't damage anything. I kind of like that even though you pay a bit more money.
Your best option in my opinion would be to order a diaphragm from TPIS, you don't have to order the whole regulator, just the diaphragm.
As far as breaking it, I broke my stock one when I made a homeade regulator and bumped up the fuel pressure, it ripped. I only had it at 46 psi. The TPIS I've had as high as 130 psi (don't ask) and it didn't rip. TPIs makes parts that are overkill so if you F-up, you don't damage anything. I kind of like that even though you pay a bit more money.
11-29-2009, 07:04 PM
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Car: 1990 Formula
Engine: LB9
Transmission: 5-speed manual
Axle/Gears: 3.42
Re: How much to replace fuel pressure regulator?
I thought I would comment on the information in many of the prior postings. The desired pressured with the vacuum hose off should be 47 lbs and may be as high as 50 when using an adjustable regulator. 43 lbs may be too low. Check out th BLMs with a scan tool to confirm the values are near 128. It may drive fine at 43 lbs but unless you read the BLMs you won't necessary be able to feel a problem if the BLMs are maxed out at 160 due to a lean condition.
The fuel pump fuse on my 1990 LB9 is by itself, not in s fuse box, mounted on the body near the battery on the driver side. It is inside a small box that one needs to unplug from the cap that is mounted to the body.
Many buyers of the following style of permanently mounted gauge report that the fuel eventually leaks into the gauge, permantently damaging it, and possible creating a fire hazard.
http://www.jegs.com/i/DFI/310/74726/10002/-1
I read some postings from others that state the Holley diaphragms have leaked in the past. They claim they tear.
I read favorable postings of the TPIS AFPR at Thirdgen but the model 100-102 for the L98 and LB9 engines from TPIS at the below link does not include the spring and diaphram. It only includes the housing/hat, adjusting screw, plate for the spring, the security Torx bit, and the upper runner gaskets. I cannot find a diaphragm for the TPI engines at the TPIS website. I may call TPIS to ask if they still sell the diaphragm.
http://www.tpis.com/index.php?module...uel+Components
One may not need to remove brake booster vacuum hose. One may not need to drain coolant if one does not remove coolant hoses on the throttle body.
Some of the above is based on the work I performed on my car today.
The fuel pump fuse on my 1990 LB9 is by itself, not in s fuse box, mounted on the body near the battery on the driver side. It is inside a small box that one needs to unplug from the cap that is mounted to the body.
Many buyers of the following style of permanently mounted gauge report that the fuel eventually leaks into the gauge, permantently damaging it, and possible creating a fire hazard.
http://www.jegs.com/i/DFI/310/74726/10002/-1
I read some postings from others that state the Holley diaphragms have leaked in the past. They claim they tear.
I read favorable postings of the TPIS AFPR at Thirdgen but the model 100-102 for the L98 and LB9 engines from TPIS at the below link does not include the spring and diaphram. It only includes the housing/hat, adjusting screw, plate for the spring, the security Torx bit, and the upper runner gaskets. I cannot find a diaphragm for the TPI engines at the TPIS website. I may call TPIS to ask if they still sell the diaphragm.
http://www.tpis.com/index.php?module...uel+Components
One may not need to remove brake booster vacuum hose. One may not need to drain coolant if one does not remove coolant hoses on the throttle body.
Some of the above is based on the work I performed on my car today.
Last edited by Brighton; 11-29-2009 at 09:40 PM. Reason: Add info and move link to correct location
03-10-2010, 06:28 PM
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Re: How much to replace fuel pressure regulator?
Hey guys good info, I think I need to replace mine so this is very helpful. I have some questions that I hope somebody can answer because nobody else can including the Chevy Dealer. I have a 1986 Iroc-Z28 with a 305 TPI, I am having a problem with my fuel system, here is whats happening. On HOT days or warm days with regular driving, after the engine is warmed up I will hear the fuel pump in the tank start to wine VERY loud. I know the fuel pump wines all the time and I know what that sounds like, this noise will get very loud then return to the normal level of noise. This will happen on and off, the engine will sputter and shut off. The fuel pump has been replaced on this car 5, yes 5 times. I have replaced it with OEM and Aftermarket pumps, replaced the wiring harness and still have the same problem that returns. After either I stop the car and turn it off or it shuts off on its own, if you open the cap on the tank filler neck, there will be a lot of air pressure that will come OUT of the tank. There has been so much pressure that if the gas tank was over 3/4 of a tank when this happens, fuel will pour out of the tank and all over the side of the car and ground. I have checked the valve behind the left rear tire and replaced it, I have checked the charcoal canister and fuel pressure and return lines for obstruction. Everything is fine. The car runs fine until that pressure builds up enough to cause the fuel pump to strain, eventually it gets damaged and I have to replace it. I cant think of anything else accept the FUEL PRESSURE REGULATOR. Gotta be, but dont want to take off all that stuff to find out that there is nothing wrong with it. The car does run rich and I get very bad gas mileage. I get about 11 mpg. The seems to run great minus these problems. It was backfiring during deceleration until I removed the smog pump. The RPM's are kinda slow to come down to idle if you rev the engine. The car has Edelbrock headers and a custom exhaust all the way back with 3" pipes, 160 Temp, but those are the only mods, everything else is stock. It has 74K miles and is in great shape minus those problems. I gotta figure this out, please help. I have been all over this site and forum, I have no answers, somebody must know.
03-11-2010, 12:29 PM
#96
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Re: How much to replace fuel pressure regulator?
Honestly check out your AFPR. An aftermarket one can run you anywhere from 50-100 dollars. It'll only take you 30 mins to an hour to change. If the AFPR is broken it'll flood your engine or not allow the flow back to the return line. Just check it out man.
03-11-2010, 01:57 PM
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Re: How much to replace fuel pressure regulator?
Any particular brand of AFPR? or do you recommend a specific site or place to get it? I have seen on this thread that the fuel rail does not need to come off, but ill have to get some new gaskets for the plenum most likely since its probably never been replaced. I have a new Throttle Body gasket already so I dont need to buy one of those.
03-11-2010, 03:21 PM
#98
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Re: How much to replace fuel pressure regulator?
The one I have is the Holley AFPR. You can buy it anwhere from
jegs summit to hawks thirdgen. I like the Holley one cause it's got a screw cap to help you adjust it. Makes it easier I think. People on here like the TPiS one. It's can handle alot more Psi than the holley one can. It's relatively cheaper too. As far as the gaskets, you can pick up some fel pros from any parts store either online or not. Or your GM dealership. Make sure you get a fuel pressure guage. I got an accel one. You need that so you can check your psi when when you simulate WOT.
jegs summit to hawks thirdgen. I like the Holley one cause it's got a screw cap to help you adjust it. Makes it easier I think. People on here like the TPiS one. It's can handle alot more Psi than the holley one can. It's relatively cheaper too. As far as the gaskets, you can pick up some fel pros from any parts store either online or not. Or your GM dealership. Make sure you get a fuel pressure guage. I got an accel one. You need that so you can check your psi when when you simulate WOT.
03-11-2010, 06:54 PM
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Re: How much to replace fuel pressure regulator?
I have checked the fuel pressure before but it was at the Auto Shop on Post and I was using their equipment. I know I gotta get one. I have seen some info in here about changing the pressure to a non stock setting that will create a little more HP but throws off emissions. I dont have to worry about emissions here so should I just keep it stock or a little higher or little lower? Its nice to find somebody that has some answers, not even Chevy was helpful. Thanks for your help man. I would like to squeeze as much HP as I can outta this car. Every little bit helps.
03-11-2010, 10:23 PM
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Car: 1990 Formula
Engine: LB9
Transmission: 5-speed manual
Axle/Gears: 3.42
Re: How much to replace fuel pressure regulator?
I have checked the fuel pressure before but it was at the Auto Shop on Post and I was using their equipment. I know I gotta get one. I have seen some info in here about changing the pressure to a non stock setting that will create a little more HP but throws off emissions. I dont have to worry about emissions here so should I just keep it stock or a little higher or little lower? Its nice to find somebody that has some answers, not even Chevy was helpful. Thanks for your help man. I would like to squeeze as much HP as I can outta this car. Every little bit helps.