Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
i am not getting any power to relay where do i go to for power at relay
is it from the ignition or fuse
Here is a diagram This should help you find where the problem is.
alright the diagram is helping using a jumper wire from the orange wire to the grey wire i get the fuel pump to come on and when i start the vehicle it dies after about 5 seonds but using that jumper wire it will start just wont stay running
Ok im gonna give you the complete test procedure. 1 sec
Circuit Description When the ignition switch is turned ON, the VCM turns ON the in-tank fuel pump. The in-tank fuel pump remains ON as long as the engine is cranking or running and the VCM is receiving the distributor reference pulses. If there are no reference pulses, the VCM shuts off the fuel pump within 2 seconds after the ignition ON or the engine stops.Should the fuel pump relay or the 12 volt relay drive from the VCM fail, the fuel pump receives a supply current through the oil pressure switch backup circuit. The fuel pump test terminal is located in the driver's side of the engine compartment. When the engine is stopped, applying the battery voltage to the test terminal can turn on the fuel pump.Diagnostic Aids An inoperative fuel pump relay can result in long cranking times. The time necessary for the oil pressure to reach the pressure required in order to close the oil pressure switch and supply the necessary current for the fuel pump causes the extended crank period. If the fuel pump relay circuit checks out OK, refer to Fuel System Pressure Test . See: Powertrain Management\Computers and Control Systems\Testing and Inspection\Component Tests and General Diagnostics\Fuel System Pressure TestExcessive fuel may also cause long cranking times which is accompanied by the following conditions:
One or more leaking poppet nozzles may also extend the cranking time. Perform the Poppet Nozzle Test, in the Injector Balance Test Table. Refer to Fuel Injector Balance Test . See: Powertrain Management\Computers and Control Systems\Testing and Inspection\Component Tests and General Diagnostics\Fuel Injector Balance Test ProcedureTest Description The numbers below refer to the step numbers on the diagnostic table.
This along with the diagram I gave you is everything.
I just recently purchased a 2004 Tahoe with 155000 miles