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Old 08-23-2006, 10:20 AM
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fuel pressure problem - holley blue pump & reg

I have a Holley Blue Pump with the included regulator on my car. I am just getting everything together and I had the fuel pressure set at 7. After the car had been running for about 15 minutes I wanted to go drive it, then I noticed that the fuel pressure was at 3??? So I re-adjusted the regulator to get it back up to 7. Then after a 2 mile drive I came home and the fuel pressure was back down to like 3.5psi

I put my gauge on the pump in the rear of the car and it held 12psi no problem....

I had some friends tell me the regulator that comes with the blue pump is a POS....

Anyone else have this problem? Should I try to take the regulator apart and see if it is clogged or something?

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Old 08-23-2006, 10:25 AM
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i got the red pump

had no problems with my pressure at all
it possible the regulator might be bad from the factory
did you get from jegs or summit return it if you did get a
new one
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Old 08-23-2006, 10:51 AM
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I had the same garbage happen with mine. I finally got so fed up with it I pulled the electric pump and regulator and went with an edelbrock high volume mechanical and have had no worries since. Unless this is a SERIOUS street /strip or strip car, you don't really need an electric pump on the street.
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Old 08-23-2006, 11:00 AM
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How much are mechanical pumps? At this point I don't want to spend much mroe money until I get more bugs fixed.... Should I look for a new regulator? How much are those?

Thanks!
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Old 08-23-2006, 12:53 PM
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If your gauge is near a heat source and is liquid filled, it becomes inaccurate and the needle drops. If not, I would make sure the system is vented.
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Old 08-23-2006, 12:56 PM
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You could have just gotten a bad regulator. I have been running the setup you descibed for years with no issues.

FYI... those "junk" holley regulators are found on MANY highend Nitrous Promod and Outlaw style cars.
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Old 08-23-2006, 02:18 PM
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seems like when the car gets warmed up, the fuel pressure drops from 7psi to 4psi... ??
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Old 08-23-2006, 02:33 PM
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Isn't that what Doublevision said would happen with a liquid filled gage when it gets hot? My electric pump setup was a constant pain in the @&%, now I have a mechanical with a good filter between the pump and the carb. The pump puts out 6 psi which is perfect for my setup and if I start showing a pressure loss, I will know to change the filter. You never did answer what kind of car this is; street, street/strip or strip only. If street only and your engine has provisions for a mechanical pump, do yourself a favor and switch. If you are going to continue running the electric, you are going to wire in a automatic shutoff so the pump doesn't continue to run if you are in an accident, right? Just another hassle about running an electric pump on the street.
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Old 08-24-2006, 09:46 AM
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The gauge isn't too close to anything to make it hot, and it isn't hot to the touch, but whatever you say!! lol

The car is a street/strip car. Never a daily driver.

I guess I will just adjust the regulator right when I start the car and see what happens. It will probably drop down to about 3psi but i guess it's an innacurate gauge haha thanks
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Old 08-24-2006, 09:58 AM
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mechanical pump



http://www.racepumps.com/features.html






Mustangsaly
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Old 08-24-2006, 10:27 AM
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uh I wouldn't mind a mechanical pump considering mine is SO loud haha....

But this car is on it's way to be a turbo motor.... so should I just keep the electric pump?

I'm guessing electric pumps are better for forced induction applications?
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Old 08-25-2006, 12:43 AM
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Try a diffrenet regulator. I am using a Holly Hp fuel pump That pumps 150 gallons an hour and I am using a barry grant regulator and everything runs fine for my set up. I am running a 427 with a 1050 dominator in a jeep and have never had any problems holding the fuel pressure a 7 lbs. Just a thought if you have another regulator sitting around
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Old 08-25-2006, 06:56 AM
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I had the same problem with my blue pump and wound up replaceing the pump. Originally I had the pump mounted above the fuel outlet from the tank . I remounted the new one (replaced under warranty) so it was below the outlet (I have since installed and RCI aluminum fuel cell) and never had a probelm since. I'm thinking the pump was over heating from fuel starvation. I like my electric pump.
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Old 08-25-2006, 07:07 AM
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I just noticed that my pump makes different noises.... when you first start the car it is pretty loud, then about 5 minutes later it gets quiter. Shake the car and it gets louder??
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Old 08-25-2006, 07:11 AM
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Im wondering if you have somthing blocking/restricting the fuel flow....

My blue pump is loud until my fuel cell runs dry. Sounds exactly like you described.
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