Question about 2002 GMC Envoy
Fuel pump pressure ok no dtc
Posted by Anonymous on
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Posted on Jan 02, 2017
P1870 is a transmission code. This code indicates a slippage in the trans between 1st and 2nd gear shift. This code would likely have nothing to do with your hard/no start issue.
Posted on Dec 08, 2008
you may have two oxugen sensors on your yukon. if so the oxygen sensor that controls that bank may be bad. from what you mentioned in your complaint, it sounds like it is the oxygen sensor.
Posted on Dec 24, 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
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