Holley Fuel Regulator Issues
Holley Fuel Regulator Issues
Seems like i cant catch a break with the new parts ive been purchasing. 1st i had a new fuel sending unit go bad after 2 weeks. Now my Holley regulator is not working. Both parts were installed back in March so both are out of warranty. I had the regulator set at 5.5 psi and car was idling awesome. Finally got around to installing my lock up kit for the 700r4 yesterday and car wouldnt start. Had a bad smell of gas and found that the carb was flooding. Well it turns out the regulator was not regulating the fuel anymore. The car has never seen the road and was probably only started 10 times and let idle for 10 minutes each time. So i took off the regulator this morning and opened it up thinking the diaphram must be torn, but it wasnt. Looks to be in really good shape. Could the regulator have gotten stuck? Tried adjusting while on car but no change at all. Has anyone experienced this type of issue with holley regulators? What could have caused this?
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Joined: Oct 2000
Posts: 3,163
Likes: 778
From: Park City, UT
Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
Re: Holley Fuel Regulator Issues
Have you checked the pressure between the reg and the carb? Maybe the reg is working...and the needles and seats are not?
Joined: Sep 2005
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Car: Yes
Engine: Usually
Transmission: Sometimes
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Re: Holley Fuel Regulator Issues
everything is new and tank is clean

Is the line clear? You have blown through it or otherwise PHYSICALLY VERIFIED that it is CURRENTLY free of obstruction WHILE IT'S IN THE ACT OF SCREWING UP?
Re: Holley Fuel Regulator Issues
I have the gauge between the regulator and carb. When car was working properly it was set at a steady 5.5 psi. The gauge has a maxium of 15psi. When the car was flooding it would shoot past the maximum psi.
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Re: Holley Fuel Regulator Issues
Supreme Member




Joined: Oct 2004
Posts: 1,055
Likes: 309
From: Missouri
Car: 1985 Z28
Engine: 305 LG4
Transmission: T5
Axle/Gears: 3.42
Joined: Sep 2005
Posts: 27,867
Likes: 2,429
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Holley Fuel Regulator Issues
everything is new and tank is clean
What you've been asked is,
Is the return line clear?
Your response is NOT the answer to that question. To SOME OTHER question maybe; butt not THAT one.
Is the return line clear? Is the line clear? You have blown through it or otherwise PHYSICALLY VERIFIED that it is CURRENTLY free of obstruction WHILE IT'S IN THE ACT OF SCREWING UP?
Re: Holley Fuel Regulator Issues
That just sucks cause i aint a rich guy and you spend good money on a product that aint worth a damn. Only one ive been seeing that everyone pretty much loves is the aeromotive brand. Cant see myself spending 200 plus on a regulator. I guess like that old saying goes, if you want to play you have to pay.
Re: Holley Fuel Regulator Issues
That's not what you've been asked.
What you've been asked is,
Is the return line clear?
Your response is NOT the answer to that question. To SOME OTHER question maybe; butt not THAT one.
Is the return line clear? Is the line clear? You have blown through it or otherwise PHYSICALLY VERIFIED that it is CURRENTLY free of obstruction WHILE IT'S IN THE ACT OF SCREWING UP?
What you've been asked is,
Is the return line clear?
Your response is NOT the answer to that question. To SOME OTHER question maybe; butt not THAT one.
Is the return line clear? Is the line clear? You have blown through it or otherwise PHYSICALLY VERIFIED that it is CURRENTLY free of obstruction WHILE IT'S IN THE ACT OF SCREWING UP?
Joined: Sep 2005
Posts: 27,867
Likes: 2,429
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Holley Fuel Regulator Issues
Of course I did.ed
Didn't answer the question Vader asked:
HAVE YOU ACTUALLY PHYSICALLY REALLY TRULY ACTUALLY checked to see if your return line is blocked?
Don't tell us about "new"", "pressure " this that or the other. You haven't answered the question yet.
IS YOUR RETURN LINE CLEAR?
Didn't answer the question Vader asked:
HAVE YOU ACTUALLY PHYSICALLY REALLY TRULY ACTUALLY checked to see if your return line is blocked?
Don't tell us about "new"", "pressure " this that or the other. You haven't answered the question yet.
IS YOUR RETURN LINE CLEAR?
Supreme Member




Joined: Oct 2004
Posts: 1,055
Likes: 309
From: Missouri
Car: 1985 Z28
Engine: 305 LG4
Transmission: T5
Axle/Gears: 3.42
Re: Holley Fuel Regulator Issues
Supreme Member




Joined: Oct 2000
Posts: 3,163
Likes: 778
From: Park City, UT
Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
Re: Holley Fuel Regulator Issues
I agree.^^
I have, in the past, bypassed the "china parts/reliability" issue, as well as the $$$ fancy parts issue by repurposing OEM parts. In a case very similar to this one, I used a TBI FPR/housing. I chopped off the injector "covers"/hold-downs, pipe thread tapped all three ports (in/out/return), reduced the spring pressure to get it down to 5-7 PSI from the 12ish it was factory set to.....and installed it in a convenient place under the hood. Worked flawlessly for years until and beyond when the vehicle was sold. So that's an option.
There are also returnless cheapy regulators (from Holley and others)....I doubt they'd be any more reliable than the one you bought....but at least they're so cheap you can not care too much and carry a spare.
I have, in the past, bypassed the "china parts/reliability" issue, as well as the $$$ fancy parts issue by repurposing OEM parts. In a case very similar to this one, I used a TBI FPR/housing. I chopped off the injector "covers"/hold-downs, pipe thread tapped all three ports (in/out/return), reduced the spring pressure to get it down to 5-7 PSI from the 12ish it was factory set to.....and installed it in a convenient place under the hood. Worked flawlessly for years until and beyond when the vehicle was sold. So that's an option.
There are also returnless cheapy regulators (from Holley and others)....I doubt they'd be any more reliable than the one you bought....but at least they're so cheap you can not care too much and carry a spare.
Last edited by Tom 400 CFI; Oct 4, 2024 at 11:12 AM.
Re: Holley Fuel Regulator Issues
Of course I did.ed
Didn't answer the question Vader asked:
HAVE YOU ACTUALLY PHYSICALLY REALLY TRULY ACTUALLY checked to see if your return line is blocked?
Don't tell us about "new"", "pressure " this that or the other. You haven't answered the question yet.
IS YOUR RETURN LINE CLEAR?
Didn't answer the question Vader asked:
HAVE YOU ACTUALLY PHYSICALLY REALLY TRULY ACTUALLY checked to see if your return line is blocked?
Don't tell us about "new"", "pressure " this that or the other. You haven't answered the question yet.
IS YOUR RETURN LINE CLEAR?
Re: Holley Fuel Regulator Issues
I agree.^^
I have, in the past, bypassed the "china parts/reliability" issue, as well as the $$$ fancy parts issue by repurposing OEM parts. In a case very similar to this one, I used a TBI FPR/housing. I chopped off the injector "covers"/hold-downs, pipe thread tapped all three ports (in/out/return), reduced the spring pressure to get it down to 5-7 PSI from the 12ish it was factory set to.....and installed it in a convenient place under the hood. Worked flawlessly for years until and beyond when the vehicle was sold. So that's an option.
There are also returnless cheapy regulators (from Holley and others)....I doubt they'd be any more reliable than the one you bought....but at least they're so cheap you can not care too much and carry a spare.
I have, in the past, bypassed the "china parts/reliability" issue, as well as the $$$ fancy parts issue by repurposing OEM parts. In a case very similar to this one, I used a TBI FPR/housing. I chopped off the injector "covers"/hold-downs, pipe thread tapped all three ports (in/out/return), reduced the spring pressure to get it down to 5-7 PSI from the 12ish it was factory set to.....and installed it in a convenient place under the hood. Worked flawlessly for years until and beyond when the vehicle was sold. So that's an option.
There are also returnless cheapy regulators (from Holley and others)....I doubt they'd be any more reliable than the one you bought....but at least they're so cheap you can not care too much and carry a spare.
Supreme Member




Joined: Oct 2000
Posts: 3,163
Likes: 778
From: Park City, UT
Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
Re: Holley Fuel Regulator Issues
Sorry, I don't. I actually went to the forums that I posted that build on (it was a Wrangler w/a carb'd 350), and any/all pics were Photophucket'ed. (gone). Sorry.
Re: Holley Fuel Regulator Issues
Supreme Member




Joined: Oct 2000
Posts: 3,163
Likes: 778
From: Park City, UT
Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
Re: Holley Fuel Regulator Issues
Blue arrow is the IN/pressure side, black arrow is the out/return side....no pressure.
"T" into the pressure line at any point between the pump and the regulator, and you got your set pressure, for the carb.
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