i have one on my car, its a three port. i am using a stock TBI fuel pump and am only getting 3pounds of fuel. i tried adjusting the regulator but there is no change and at. any ideas what could be wrong? i took the top of the regulator off and theres a diaphram and a spring. there cant be that much to this thing. any suggestions? thanks.

 

3 points.

1. That reg should NOT be used with a fuel injection pump of any sort. It'll cause problems.

2. the only thing that ever really goes wrong with the reg itself is the diaphram may tear with age or excess pump-side pressure. Like..ohh..from running it in front of a FI pump.

3. Not being able to turn up the pressure is probably not the reg anyway, but the pump being dead. Like...ohh..say fried from running it behind a regulator with no bypass provision like you are.

 

well ohhhhh lets say that the i am using the factory return line? is that good enough for you? i asked for help not your attitude:nono:

 

lol using the return line how? Last I looked..which was a little while ago I admit, Holley didn't make a regulator with a provision for one. In fact last I checked...Mallory and BG were the only one that did make a 3 port bypass, and I heard BG discontinued thiers.

 

 

lol well that would be at least one problem. Thats supposed to be a delivery line...like to the secondaries or a NOS system or something. It's not for a return fitting.

 

That is your entire problem right there!Get a Mallory regulator #4309 and set it up as you have this one..only the Mallory is supposed to have a return line provision.That Holley regulator as stated by Jester has no prvision for a return line as you have it hooked up.I am suprised the car even runs like that!The Mallory comes with a nice metal mount also...that tie strap is a nice touch though..Car Craft style.Please don't go and get all pissy like other kids on the board..np flame meant just bustin *****!

 

well hell, aint this some ****
thanks for the help, yeah even you jester

 

car craft rocks!!:rockon:

 

I agree CAR CRAFT kicks a**!!!!! and who says that setup doesn't work?!?!?! It's working fine on my car currently!!! I don't have any pics but it's working just fine. The only current problm is in the mixture. And LilJay if you wanna come out by Chicago let me know. I'll bring ou the car and show ya that it works. My bet is on your fuel pump. Maybe look into wiring a switch for it so if you think your running the pump too much yu can turn it off and letthe carb suck it straight out the tank.

 

you are using the same holley regulator, input is on the bottom, one line going to the carb and the other to the factory return line? what do you mean you have a mixture problem? thanks. oh, the pump is new, but that doesnt mean anything, i need to check the fuel pressure when it comes out of the tank to see what it is there.

 

I've got the exact same setup. stock pump in-tank with the same holley regulator. My mixture problm is in the jetting and metering rods...stock edelbrock is WAAAAYYYYY too rich. No big deal. But the only problem I have is running outta gas (gas gauge doesn't work). Anyway I haven't had a problem in the last month that the engne has run. runs fine until 4K, that's as far as I've risked it. If you got an questions let me know and I should be able t help.

chris

 

how much fuel pressure do you have? i have 0-3 psi and i am unable to adjust it.

 

Honestly I wish I could tell ya. Unfortunately my gauge doesn't read anything. I haven't messed with the way holley sent it to me so whatever they had it at is where it's at. As for your problems first, I'd make sure the pump is running when you turn the car on. It may sound stupid but I'd check it just to make sure, because if I'm not mistaken the pump is actually turned on by the computer. I believe the power wire for the relay is green with a white line. that's the wire that turns the relay "on". If it is running then go to the fuel filter. If that's clogged you ain't gonna get jack at your regulator (reason you only see 0-3 psi.). The only reason I suggest these reasons is the fact that the holley regulator only goes down to 4 psi. and up to 9 psi. So either way you go the engine will start and run but.....key word is but, If it's too low you won't really go anywhere because as soon as the bowls empty you've got to wait for it to refill. If it's too high you're just gonna fill it too fast for it to work efectively. Good Luck and let me know if you need anything else.

 

i have rewired the fuel pump relay. it comes on when you turn the key on, and the gauge goes to 3 psi. and no matter how much i turn the regulator, it doesnt change anything.

 

I believe GMPP used that regulator with a return line in the 350 HO conversion kit. Details here.

 

Since your pump works check the filter. only way to do hat is to remove it. Since it comes off anyway go ahead andreplace it, i's like $5. If that doesn't help check the lines for crimps or pinches, if everything is ok than your pump ain't workin'.
good luck
chris

 

What's interesting is the HO 350 conversion kit DOES in fact use a Holley regulator, with a return line, and it DOES work. I've got it on my car, and that's one part I've never had trouble with (well, one I regulated it down below 9psi, that is).

 

hmm, i wonder if anyone has told jester this. i havent had a chance to check the fuel pressure or the filter because i have been busy with school and work, and today it started snowing and its cold. thanks for the replies though, i do appreciate it.

 

bump

 

I WIH I HAD A TPI SETUP!!!! my friggin' carb went from way rich to lean on the primaries. Not thing though, I'm gettig a Holley 750 for $20!!!. Anyone want an Edelbrock 600???no choke and vac. sec. $75. works like a charm, stock jetting.

 

WTF????

 

sorry just venting. My carb is playing tricks on my head. no biggie though.

chris

BTW did you get a chance to check that filter yet???

 

lol, its ok, no i havent got a chance yet, my buddies 71 bird is in the garage, we are putting a new cam in it, no going well......and its snowing here now. i hate winter........:lala:

 

no crap..it's snowing across the border?? Why are you guys having a hard time with the cam??? It's a big peice of machined steel......good luck

chris

 

you guys do realize that by setting the regulator up that way your actually pumping fuel BACK into the tank right? All you've basically done there is put a T fitting in your fuel line and shot one end to the carb and one end back to the tank. It just so happens that the "T" fitting in this case is the regulator. Depending on the placement of the FP guage, your prolly getting low psi because half of it is shooting back to the tank. Take off that "return" line and cap the end of the regulator. Then start the car, betcha it'll run right...

Eric

 

I would think GM would have though of that. They aren't that stupid. I believe BOTH regular outputs have a restriction in them. I have measured the fuel pressure at the output of the regulator itself and it is a SOLID 5.5 psi even when revving the motor.

 

sorry for the descrepency, i wasn't referring to your setup Hawk. just out of curiousity, do you know the pn of your regulator? Is it the same one shown in the picture above?

Eric

 

Nope, it's been three years since I put it in, and the kit doesn't give you the Holely P/N anyway. I tracked it down at some point but have long since forgotten.

It's mounted on the mechanical fuel pump block off plate, so it is nearly impossible for me to even get a picture of it.

 

does it look like the one in the pic above?

 

Yeah, going from memory, it looks just like that one

 

hmmmm. interesting. thanks for the info.

eric

 

what is the difference between the factory setup with TBI, going into the throttle body, hitting the regulator, turning around, and going back to the tank? a TBI pump runs 13-15 psi normal and around 55psi(i think, can check to be sure)at dead head, thats when you close the return line off. with the mallory type regulator, what exactly are the provisions that make it a bypass type regulator?

 

i havent got a chance to check the fuel pressure yet, but is the general consensus(sp?) is that this set up works?

 

i clamped the return line down(the rubber part)to dead head itand the fuel pressure went to 10PSI, i think its supposed to go higher than that considering the stock pump is supposed to run 13-15PSI.