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Re: 1988 chevy 4.3 smell rich runs lean
the vaccum is @ 20 hg at idle and no leaks detected ...egr valve test good also. i can be sure beyond doubt that there are no fuel leaks. the O2 sensor shows that it is switching lean and rich .. but the black somke out the pipe says more rich than lean.
but the lack of power/miss/stumble @ 1/3 throttle under load is most disconcerning. if you drive it like u stole it, runs better .. wide open throttle or no throttle and its driveable ..:( but wont go if u drive like a sane man ..
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