rough idle on 95 s10 blazer 4.3 vortec vin w

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

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

1 Answer

19,235

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

Your Answer

Chevrolet Blazer Experts

  • #1
    Andrew Olsen
    Reputation
    2,030
  • #2
    yetilikesbeer
    Reputation
    1,350
  • #3
    Rowefast
    Reputation
    1,030
View All

Related Models For Sale

Used Chevrolet Tahoe
658 Great Deals out of 39,224 listings starting at $1,000
Used Chevrolet S-10
10 Great Deals out of 1,211 listings starting at $2,450
Used GMC Jimmy
236 listings starting at $1,950
Used Ford Bronco
183 listings
Used Chevrolet Suburban
333 Great Deals out of 21,587 listings starting at $1,900
Used Jeep Grand Cherokee
863 Great Deals out of 70,094 listings starting at $1,045
Used Ford F-150
2,245 Great Deals out of 179,993 listings starting at $1,300
Used Ford Explorer
809 Great Deals out of 62,574 listings starting at $1,000
Used Chevrolet Camaro
383 Great Deals out of 30,498 listings starting at $3,500
Used Chevrolet C/K 1500
3 Great Deals out of 862 listings starting at $2,000
Used Jeep Cherokee
348 Great Deals out of 45,620 listings starting at $2,795
Used Chevrolet Impala
479 Great Deals out of 33,615 listings starting at $777

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.