Fuel Pressure Question
Thread Starter
Burning Brakes
Joined: Dec 2005
Posts: 805
Likes: 11
From: Hickory Flat Ga
Fuel Pressure Question
1996 LT1. At cold start I have 34 lbs. Tapping the throttle takes it to to 32 lbs. When I stop the engine the pressure goes to 5 lbs. after 10 minutes.
I assume the pump is gone. Would a filter do that? Any help is appreciated before throwing parts at it.
I assume the pump is gone. Would a filter do that? Any help is appreciated before throwing parts at it.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
It sounds like the regulator is functioning properly. The drop in pressure with the engine off is a common occurence and not necessarily a performance problem. Based on what you have stated, I would not replace anything. Is there a performance problem?
Thread Starter
Burning Brakes
Joined: Dec 2005
Posts: 805
Likes: 11
From: Hickory Flat Ga
Bad idle, random cylinder misfire. I have another thread about all the issues following a head gasket repair.
Isn't that low? Shouldn't the gauge hold for a long time, say an hour?
Isn't that low? Shouldn't the gauge hold for a long time, say an hour?
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
My 85 dropped to 0 psi within minutes. It never affected driveability. As for the pressure at idle, I don't know what factory pressure is for your year. But it does sound low.
