drop in fuel pressure

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Sep 6, 2002 | 05:32 PM

fourspeed

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Joined: Jun 2001

Posts: 117

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From: Orlando, Fl, U.S.A.

drop in fuel pressure

i put a fuel pressure gauge on and within 30 minutes it read zero....is this normal.
GM put a new fuel pump in 8 months ago
is there a check valve somewhere that could be leaking down?
thanks for any info

Sep 7, 2002 | 06:00 PM

Gruvin84SS

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Joined: Oct 2001

Posts: 151

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From: Texas

sounds like your regulator is leaking by or you have a leaky injector(s). Try pinching the hose on the return and see if it holds pressure, then let go, if it goes down then it is the regulator.

Sep 7, 2002 | 06:53 PM

88 IROC BOB

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Joined: Jan 2000

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From: Essex, Ontario, Canada

I'll bet on leaking injectors. That's the problem I had anyway.

Bob

Sep 7, 2002 | 10:33 PM

xformula79

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Joined: Aug 2002

Posts: 132

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From: Hammond, In

If the regulator is leaking by then it usually takes longer to start the car after it has been sitting a while because it takes longer to build the fuel pressure back up