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2000 Chevy Silverado 5.3L fuel pump issue?
My truck would not start. I assumed it was a bad fuel pump since I didn't hear it operating when key was turned on.
I measured the voltage at the engine control center 'prime' terminal and also at fuel pump connector with ignition switched on. Looks good for 2 seconds as expected for the prime.
I replaced the fuel pump. New pump sounds like it is working (comes on for the 2 sec prime). The truck still won't start. I repeated this many times: switch ignition on and off to help prime the system.
Also replaced fuel filter. I checked to see if there was any fuel pressure at the fuel rail. Just a little came out. I disconnected the fuel line at the pump and connected a hose directly off the fuel pump and nothing was coming out. I got another fuel pump (same manufacture) assuming I received a bad one. The same thing. Used some starting fluid - truck turns over a second or two until fluid burns off.
I used a fairly inexpensive one from 1Aauto $105.
Any other ideas on what I can test to verify a fuel pump issue.
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from what you have tested I would say go buy a A/C delco fuel pump.
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Above is straight out of the factory manual. If you are only paying $105.00, it can not be very good. As long as you have power and ground to the pump the problem has to be the pump. I recommend a better pump preferably Ac Delco.
ASE Master Tech, L1 Advance Engine Performance certified
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