1998 GMC Envoy "pump pressure above 30" Questions

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Question about GMC Envoy

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...pressure level in the tank it sends fuel vaper to the charcoal canaster from the tank where it is stored until your at highway speed then the canaster purge sloeniod opens and the vaper is burned in ...

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...pump control test for fuel pressure at service port about 36 psi running and as you rev the engine it should go up 40-45 psi and when shut off it should retain pressure above 30 psi when dies check ...

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pressure relief valve which is located within the oil pump. You could try using some oil flushing product in the engine oil before the next oil change to see if it removes the gunk that is causing the

...pump. If pressure o.k. but dies out and pressure drops but restarts, check oil sending switch as this controls fuel pump. Computer primes pump for start, then oil sender powers up pump for normal ...

...PUMP SUPPLIES HIGH- -PRESSURE FUEL OF APPROXIMATELY 45,000 KPA (6,526 PSI) TO EACH INDIVIDUAL INJECTOR THROUGH THE HIGH-PRESSURE LINES. FUEL UNDER THIS AMOUNT OF PRESSURE CAN PENETRATE THE SKIN AND ...

Question about GMC Envoy

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...pump should run. Pressure s/b typically arount 36 - 45 lbs. The motor will run with pressure down to about 28 - 30 lbs although maybe not very well. Below about 24 lbs it will simply not run at all. ...

...tap on injector rail with fuel pressure gage. If above 30 p.s.i. pump o.k. Check for spark at plugs. If no spark suspect crank sensor. If check engine light on have codes read to help in

...pressure) a weak bypass spring in the pump, or a the wrong oil filter or oil. If you are not hearing any "lifter clatter" or knocking when u start it, I wouldn't be too concerned about a bad pump ...

Question about GMC Envoy

1 Answer

...Fordboy, I think that the fuel pump pressure is too low....it should be around 3.4 bar and above to 4.7. 1 bar = 14.5 lbs at sea level min pressure for your vehicle should be 49.9 lbs Regards ...

...the gas. if i release my foot it dies, but if i keep pumping it i will run kinda, sounds like a fuel problem. check for fuel filter if clogged replace also check for fuel pressure above 30 psi is ...

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