Mechanics

CHEVROLET AVALANCHE FUEL PRESSURE PROBLEM

2002 Chevrolet Avalanche • 147,476 miles

Its start and die I good fuel psi new fuel filter new fuel pump if I spray starting stuff in the intake it will good stop spraying it dies
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Johndavey
November 11, 2012.



Check the fuel pressure. It may be a failed pump

Roy

ASEMaster6371
Nov 11, 2012.
Its new what the pressure got to be

Tiny
Johndavey
Nov 11, 2012.
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

ASEMaster6371
Nov 11, 2012.
Thank be right back to tell u what it is and how do u fine what ie is in the vin how many # in

Tiny
Johndavey
Nov 11, 2012.
8th digit

Roy

ASEMaster6371
Nov 11, 2012.
Key on pump run for 2 sec or so about 58 psi

Tiny
Johndavey
Nov 11, 2012.
What do u think it is

Tiny
Johndavey
Nov 11, 2012.
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

ASEMaster6371
Nov 11, 2012.
How do u check that

Tiny
Johndavey
Nov 11, 2012.
Where is it on a 5.3L vortec

Tiny
Johndavey
Nov 11, 2012.
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