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Gary
Gary, ASE Certified Technician
Category: GMC
Satisfied Customers: 16102
Experience:  GCM master tech over 25 years
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GMC: have a 1998 GMC truck...cranks once in a while..it has

Customer Question

have a 1998 GMC truck...cranks once in a while..it has ignition fire at plugs..fuel pressure40lbs..injector pulse..compression ....need help please
Submitted: 1 year ago.
Category: GMC
Expert:  Gary replied 1 year ago.
I am sorry for the long wait40 psi key ON engine OFF ?will the engine run on starting fluid ?40 psi is way below spec the spec is 60 - 66 PSI key ON engine off those spring loaded injectors need all the fuel pressure to be able to open up and send in fuelif the gauge is known good your testing with then replace the fuel filter if it is still low the fuel pressure the fuel pump needs to be replaced and once the fuel pressure is to spec it should run

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