Question about 1994 GMC Sierra
When it is running i have 52 psi fuel preesure
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Posted on Jan 02, 2017
SOURCE: 1999 Yukon cold start problems.
1999 Yukon Start Issue - I have replaced the octopuse, battery, fuel filter, fuel pump, still having problems starting in cold weather, sometimes after a heavy rain.
Posted on Dec 08, 2008
When you hook the pressure test guage to shrader valve on fuel rail what it reads is what the pressure is from pump, around 60 p.s.i. all you need to do is hook up the guage and turn on key, you do not have to turn engine over, and if pump is good it will shoot up to 58 or 60 right now.
Posted on Feb 14, 2009
the fuel pressure if leaking could cause this the regulator is located under the intake plenum but you should smell gas .if you dont then most likely the pump is bad ,the pump will come on for 2 seconds when the key is on then go off it will not stay on with just the key on only when you crank it will it .so have your fuel pressure checked with a gauge.
Posted on Mar 22, 2009
It sounds like you have a pin hole in the hose that goes to the fuel pump in the gas tank. The pump is mounted on springs and it is common for the plastic hose to get a hole rubbed in it from one of the springs. This usually cause the vehicle to be real hard to get started when it is cold.
Posted on May 18, 2009
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