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99 chevy extreme 4.3 vortec

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I put new plugs and wires on my truck, it ran so much better that day. Next morning I went to go out in it and it wouldnt start. new fuel pump relay, ignition control module replaced. still not starting. Any help would be appreciated guys.

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Fire to the plugs or just at the coil? Check the ignition rotor for a burn hole . What is your fuel pressure? Do you have injector pulse? Any codes? If all that checks out possible timing chain issue, Does it start with a shot of carb cleaner?

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Posted (edited)

Give it a shot of carb cleaner and see if it fires. you need to get a scan tool to get the codes that set limp mode although I don't think there was such a thing as limp mode in 99

Edited by richard wysong
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