low fuel pressure [Archive] - GrandAmGT.com Forum

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blackramair
04-16-2005, 07:59 PM
i am having problems with fuel pressure. i have checked the regulator and it is not leaking. it is possibly leaking in the fuel rail. it is not visably leaking though. it is losing pressure within 10 min though. any suggestions would be helpful

Malaclypse
04-17-2005, 12:07 AM
10 minutes is fine. You only have to worry when fuel pressure drops right when you shut off the vehicle. And it honestly isn't anything to worry about.

Just let the key sit in run for a second or two before you crank over the engine.

Ridenour
04-17-2005, 10:13 AM
It sounds like your pump could be dying. It is common for bad pumps to be fine upon startup, but die after like 10 or 15 minutes from getting heated up.

blackramair
04-17-2005, 05:50 PM
pressure is lower than it should be i think? does anyone know how much pressure is on a 99?

SilverGAGT04
04-18-2005, 07:16 PM
35-40 psi

redfox
11-09-2005, 07:52 PM
i know old thread but, My car want start and i had it towed to a dealer. the checked the pressure and it was 7psi.... bad fuel pump?

Malaclypse
11-10-2005, 01:58 AM
THey need to check the output (in volume) of the pump. Its possible that the fuel pressure regulator could have blown out so bad that it won't hold pressure.

However, a pump is more likely... Just make sure they double-check before you invest in a $500 part.