i ve a 97 chevy 1500 4wd that has started to smoke a grey color the sevice engine also came on about the same time and stays on for the most part what is my problem
it seems to somke only when its idling has strong exhaust smell check engin is on almost all tht time when running 50 or 55 it cut in and out especially going upgrade but with a bit more gas it pulls back to smooth running
check fuel pump pressure, fuel pump could be the cause.
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