rough idle on 95 s10 blazer 4.3 vortec vin w
10

Asked by Bird473 Jan 07, 2016 at 08:21 AM about the 1995 Chevrolet Blazer LS 4-Door RWD

Question type: Maintenance & Repair

Will a bad knock sensor cause
rough idle & black smoke come
out the tail pipe if u rib up the
engine it dont have mass air flow
sensor r crankshaft sensor it runs
good when I first crank it after it
warms up it starts rough idle

2 Answers
60,335

Andrew answered 8 years ago

Check fuel pressure and leak down to rule out the fuel system. Is the check engine light on?

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30

GuruWN6R4 answered 5 years ago

Running but keep idle up and down some time it will cut off

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Your Answer:

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