Low Fuel Pressure
Thread Starter
Senior Member
Joined: Oct 2003
Posts: 544
Likes: 2
From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
Low Fuel Pressure
I run a holley blue with a holley regulator.
It seems that the regulator sticks. The fuel pressure will jump from 3.5 to 6 lbs and the regulator makes a solonoid like sound.
I removed and cleaned the filter which is in line before pump. I was stopped up with fuel cell foam. After cleaning problem did not go away.
All hose is 8 an.
Could I have a pump or regulator problem.
Fuel gauge is a VOD with a mallory isolator connected to the regulator. Run this set up for 3 years. No problems until this weekend.
It seems that the regulator sticks. The fuel pressure will jump from 3.5 to 6 lbs and the regulator makes a solonoid like sound.
I removed and cleaned the filter which is in line before pump. I was stopped up with fuel cell foam. After cleaning problem did not go away.
All hose is 8 an.
Could I have a pump or regulator problem.
Fuel gauge is a VOD with a mallory isolator connected to the regulator. Run this set up for 3 years. No problems until this weekend.
Supreme Member
Joined: Jan 2009
Posts: 1,126
Likes: 0
From: Columbus Ohio
Car: 91 Z28,64ImpalaSS4094spd,67 Galaxy
Engine: Dart 415Profiler hd,cmprlrs,Hlly750
Transmission: Built 700R4, 3200 stall
Axle/Gears: 3:89 Moser 9"
Re: Low Fuel Pressure
I'd check the pressure before the regulator and see if it's got consistent pressure and move on from there...
Joined: Mar 2000
Posts: 43,187
Likes: 45
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Thread Starter
Senior Member
Joined: Oct 2003
Posts: 544
Likes: 2
From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
Re: Low Fuel Pressure
The filter.
tank to filter to pump to regulator to carb.
tank to filter to pump to regulator to carb.
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