What is jumping time and why does it happen and how do you fix it 95 4.3l vortec 4wd

Asked by Dec 16, 2014 at 04:56 PM about the 1995 Chevrolet Blazer 4 Door LS 4WD

Question type: Maintenance & Repair

Car was running then started sputtering and sounded like it was sucking air then died cat
get back running

2 Answers

41,895

Jump timing is when the timing chain becomes loose and may jump a couple of teeth from the gear. I doubt this is your problem. I have never had any vehicle jump a tooth. Usually they just break. Take off your distributor cap. Have someone hit the key while you watch the rotor. Did it turn when the engine turned? If so, your timing chain is not broken. If not turning, the timing chain is broke. Check your air intake hose that attaches to the throttle body. Did it come off or is there a large crack in it? I had one split and my car did the same thing. Just sucked air and died. The hose had split causing too much air flow. The car would instantly die out. Also check all your vacuum lines. Make sure all hoses are good. If all looks good, your fuel pump may have died also. The car will not sputter if the timing chain lets go. If you are getting fuel, then check for spark. Your coil may have failed also.

1 of 1 people found this helpful.
10

That is when the timeing chain or belts gets worn and it allowes the crank get out of time with the cam. It is time to replace the timing gears and chain

1 of 1 people found this helpful.

Your Answer

Chevrolet Blazer Experts

  • #1
    Andrew Olsen
    Reputation
    2,040
  • #2
    yetilikesbeer
    Reputation
    1,390
  • #3
    Rowefast
    Reputation
    1,060
View All

Related Models For Sale

Used Chevrolet S-10
20 Great Deals out of 1,251 listings starting at $1,600
Used Chevrolet Tahoe
729 Great Deals out of 41,709 listings starting at $1,995
Used GMC Jimmy
241 listings starting at $1,950
Used Ford Bronco
203 listings
Used Ford F-150
2,579 Great Deals out of 199,186 listings starting at $1,300
Used Chevrolet Camaro
446 Great Deals out of 30,844 listings starting at $1,450
Used Chevrolet Impala
540 Great Deals out of 35,256 listings starting at $900
Used Ford Explorer
934 Great Deals out of 69,574 listings starting at $1,495
Used Chevrolet Suburban
370 Great Deals out of 23,010 listings starting at $1,999
Used Chevrolet C/K 1500
881 listings starting at $1,900
Used Jeep Wrangler
335 Great Deals out of 17,476 listings starting at $2,995
Used Jeep Grand Cherokee
866 Great Deals out of 70,559 listings starting at $700

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.