misfire in cylinder 4 on a 6 cylinder jeep grand cherokee 2001 HELP! PLEASE!

30

Asked by Jul 15, 2013 at 03:06 PM about the 2001 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

Ok at a loss here please help. Had check engine light on. Code came up as a misfire in cylinder 4. So replaced all spark plugs ( they had a white powder like substance on heads) and new coil packs (arm) all at right size. Still shakes like crazy when idle. lound running when under 30. RPMs a little out of wack. Mounts are nice and tight ....... anybody know where to go from here ?

1 Answer

25,595

The white substance is most likely a dielectric compound - good stuff. The fire triangle: Fuel, heat and air. Injector, spark plug, wire, cap, compression, lifter, rocker. I'd look at the fuel delivery (injector) - is it getting power and does it work?. I'd also look at compression in this cylinder versus the other cylinders (valve problem). I wouldn't drive it until I got it fixed. Could damage the Cat if it's dumping a lot of unburned fuel.

4 of 4 people found this helpful.

Your Answer

Jeep Grand Cherokee Experts

  • #1
    inuevafreak
    Reputation
    2,120
  • #2
    Tom Demyan
    Reputation
    1,900
  • #3
    thejeepdoctor
    Reputation
    1,830
View All

Related Models For Sale

Used Jeep Cherokee
384 Great Deals out of 47,682 listings starting at $2,795
Used Jeep Wrangler
305 Great Deals out of 16,323 listings starting at $2,500
Used Ford Explorer
858 Great Deals out of 63,885 listings starting at $1,000
Used Dodge Durango
305 Great Deals out of 21,541 listings starting at $2,195
Used Toyota 4Runner
291 Great Deals out of 22,098 listings starting at $1,750
Used Chevrolet Tahoe
651 Great Deals out of 39,640 listings starting at $1,000
Used Ford F-150
2,325 Great Deals out of 184,536 listings starting at $699
Used Chevrolet Silverado 1500
2,132 Great Deals out of 167,426 listings starting at $1,900
Used BMW X5
447 Great Deals out of 12,377 listings starting at $1,000
Used Ford Mustang
712 Great Deals out of 38,332 listings starting at $895
Used Chevrolet Camaro
427 Great Deals out of 30,916 listings starting at $3,550

Used Cars For Sale

2018 Jeep Grand Cherokee Laredo 4WD For Sale
3,989 listings starting at $27,288
2017 Jeep Grand Cherokee Laredo 4WD For Sale
9 Great Deals out of 2,823 listings starting at $23,999
2016 Jeep Grand Cherokee Laredo 4WD For Sale
529 listings starting at $27,170
2015 Jeep Grand Cherokee Laredo 4WD For Sale
18 Great Deals out of 839 listings starting at $17,756
2014 Jeep Grand Cherokee Laredo 4WD For Sale
12 Great Deals out of 859 listings starting at $13,688

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.