High Fuel Pressure

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May 2, 2009 | 08:13 PM

hotrodta57

Thread Starter

Junior Member

Joined: Feb 2008

Posts: 30

Likes: 0

From: Texas

Car: 1988 T/A

Engine: L98 Highly modified

Transmission: TCI 700R4

High Fuel Pressure

I have an Accel AFPR with the adjustment screw turned completely out yet my pressure is at 50psi with vac disconnected and 43psi connected. Any ideas as to why? I believe it should be at 36psi.

May 2, 2009 | 10:21 PM

rgarcia63

Supreme Member

Joined: Jan 2003

Posts: 2,133

Likes: 4

From: Houston, Texas

Car: 88' IROCZ

Engine: 388 TPI Motown 350 Race block

Transmission: 700R4

Axle/Gears: 2.77

Re: High Fuel Pressure

Probably a bad. or weak pressure spring in the regulator, or insufficient vacuum.

May 6, 2009 | 07:32 PM

pandin

Senior Member

Joined: Sep 2007

Posts: 1,091

Likes: 1

From: West Central Ohio

Car: 86 vette

Engine: 383

Transmission: 700R4

Axle/Gears: 3.07

Re: High Fuel Pressure

I beg to differ 7# is about right for the vacuum change, and the more you screw in the bolt the more spring and fuel pressure. The spring is too long/too strong with bolt backed out.

I would check that the bolt is fully retracting and then shorten the spring by an amount less then the extended bolt (all the way in).