2004 chevy avalanche with random missfire

Asked by Oct 12, 2019 at 10:35 AM about the 2004 Chevrolet Avalanche 1500 RWD

Question type: Maintenance & Repair

I have a 2004 Chevrolet avalanche with the 5.3 at 296000
miles. I recently replaced the knock sensors and the water
pump and everything has gone down hill from there. At first
it wouldnt start and I hooked an additional ground wire to it
and it started but shortly after it missfired bad and wouldnt
even idle I have replaced the spark plugs, plug wires, and
the intake gaskets but no luck. It reads to have 58 fuel psi.
I've taken out the o2 sensors and nothing seems to work.
Any ideas or advice?

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