Q for those with an AFPR
Pro
Joined: Nov 2006
Posts: 638
Likes: 0
From: Plano TX
I actually ended up having to return my Holley twice because fuel was leaking past the diaphragm right near the center where it mates to the metal. I could actually spin and move the rubber around with a little pressure when investigating what was going on. I figure if I could move the rubber around on my own with less that 5 lbs pressure, then at 35 PSI it's probably pushing it to the side a little and allowing a little fuel to leak past. I found this to be true after removing the vacuum line with the car running. I could see an occasional squirt of fuel. Now, I may have just ran into a bad run of them and they may work perfect for others. But I was tired of replacing it, so I returned it for good and just got one of the AFPR that looks like the stock housing with the screw on top.
Haven't had troubles since and I don't have the leak down issue anymore either.
Haven't had troubles since and I don't have the leak down issue anymore either.
Racer
Joined: Jul 2007
Posts: 375
Likes: 0
From: Wichita Falls tx
ive got an aeromotive afpr and mine is doing the same thing, i was researching some past posts and there was one by rukwkr that said that when he installed his it did the same he called aeromotive and they said that instant bleed down was normal thus causing the delayed start. Hope this helps
Pro
Joined: Dec 2000
Posts: 555
Likes: 2
From: RDU NC
ive got an aeromotive afpr and mine is doing the same thing, i was researching some past posts and there was one by rukwkr that said that when he installed his it did the same he called aeromotive and they said that instant bleed down was normal thus causing the delayed start. Hope this helps
Drifting
Joined: Mar 2002
Posts: 1,251
Likes: 2
From: Thomson Georgia
I've used several AFPRs from different manufacturers. Without exception, they have all leaked down, some more quickly than others. Specifically, Aeromotive and Holley.
Most use a ball / flat flange seat combo (Aeromotive), and there is some offset interference when closed. With full vac and no vac, Aeromotive usually has 5-8 psi difference and Holley around the same.
Factory FPRs will normally hold pressure for a length of time.
Most use a ball / flat flange seat combo (Aeromotive), and there is some offset interference when closed. With full vac and no vac, Aeromotive usually has 5-8 psi difference and Holley around the same.
Factory FPRs will normally hold pressure for a length of time.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
I don't know which brand Mid America sells, but I bought my AFPR from them several years ago. I have not had a problem with this at all and no problem with leak down. I run 39 PSI with no problems.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
My fuel pressure leaked down pretty quick with the stock FPR and after I installed the Holley AFPR. After replacing the pulsator in the tank, the fuel pressure will drop from 40 psi to 30 psi in about 40 minutes. Where before it would drop to 0 psi within 5 minutes. Fuel pressure should hold even with a aftermarket adjustable or nonadjustable FPR's. I don't believe what some say about it holding over night, but it seems normal for it to hold for over an hour.
