check the fuel pressure. it may be a failed pump

Roy

Answered by ASEMaster6371 (expert)
24,788 answers provided

its new what the pressure got to be

Response from johndavey
3 questions asked

Measure with the Key On Engine Off with the fuel pump commanded ON.

Vin (V,T,U)
Fuel Pressure (gasoline) 55-62 psi

Vin (Z)
Fuel Pressure (ethanol) 48-54 psi

These specifications are taken from the Fuel System Diagnosis. For complete testing of fuel pressures and volume see Fuel System Diagnosis, See: Powertrain Management\Computers and Control Systems\Testing and Inspection

Answered by ASEMaster6371 (expert)
24,788 answers provided

thank be right back to tell u what it is and how do u fine what ie is in the vin how many # in

Response from johndavey
3 questions asked

8th digit

Roy

Answered by ASEMaster6371 (expert)
24,788 answers provided

key on pump run for 2 sec or so about 58 psi

Response from johndavey
3 questions asked

what do u think it is

Response from johndavey
3 questions asked

hmmmmm. 58 lbs. thats good enough to start it. there is no toggle for the injectors. i would check the crank sensor as it controls the injectors being toggled.

Roy

Answered by ASEMaster6371 (expert)
24,788 answers provided

how do u check that

Response from johndavey
3 questions asked

where is it on a 5.3L vortec

Response from johndavey
3 questions asked