Quote:
Originally Posted by dcarreno2006
i have a 93 Chevy 3/4 ton pinging. i Know thats its my timing being advanced for some reason. I just dont know why its being advanced or whats causing it. The truck ran fine before this. Its my driver and I retarded the timing to get the pinging to go away for now. Now you can imagine how its running for now. Can some one point me in the right direction.
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Is egr valve working?
Have you checked or set base timing?