Question about 1990 Chevrolet C1500

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No power. slight miss at idle.

Engine starts good and seems to run good but has a huge lack of power. I have change the coil,distributor assembly, rotor, cap, wires, plugs, air filter and fuel filter. If i advance the timing it seems to perform better. When i have the timing light on it and rev the engine the timing will advance for second or two and then returns to static. This happens when I rev up and stay at steady rpm. I have tried disconnecting the knock sensor but all this does is put the service engine soon light on.

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Did you unplug the wire behind the distributor before you timed it?
if not try that and retime it then plug it back in also you might go ahead and replace the knock sensor. I know you checked it

Posted on Apr 22, 2009

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Posted on Jan 02, 2017

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