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

24,215

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

Add photo

Related Questions

  • What could be wrong with my 1996 Jeep Grand Cherokee? 40 answers

    I've been having problems with my Jeep. It started like 3 months ago, the engine just cuts off while I'm driving or at a stop light. In other occasions the engine starts skipping, turns off, then will...

    1996 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • Jeep Grand Cherokee SRT8 Problems. Diagnostics. Help? 1 answer

    I have a 2007 jeep grand cherokee that randomly shuts off while I'm driving. At first it happend every now and then nut it has gotten worse. It starts up fine. But it turns off while backing up. W...

    2007 Jeep Grand Cherokee SRT8 4WD

    -

    Maintenance & Repair

  • 2001 Grand Cherokee Tail Lights Don't work 27 answers

    One night all my tail lights went out. No rear parking lights, no brake lights, no tail lights. The only thing that is on is the license plate lights. Rear turn lights work, reverse gear light works...

    2001 Jeep Grand Cherokee

    -

    Maintenance & Repair

  • jeep grand cherokee 2004 - entering radio code 9 answers

    hi, i have a jeep grand cherokee 2004, i have radio code but I have number 6 in code, and i have only 1-5 buttons, how can i enter number six , thank you ?

    2004 Jeep Grand Cherokee Special Edition 4WD

    -

    Maintenance & Repair

  • Is a 99 jeep cherokee witha Inline 6 a good choice??? 37 answers

    Looking to buy one for the wife! Is it a good motor? Reliable? Gas mileage? THANKS

    1999 Jeep Grand Cherokee Laredo

    -

    Shopping & Pricing

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 inuevafreak
inuevafreak
Reputation 2,060
#2 Tom Demyan
Tom Demyan
Reputation 1,830
#3 thejeepdoctor
thejeepdoctor
Reputation 1,740
View All

Related Models For Sale

Used Jeep Cherokee
460 Great Deals out of 52,445 listings starting at $1,800
Used Jeep Wrangler
277 Great Deals out of 18,163 listings starting at $2,950
Used Ford Explorer
944 Great Deals out of 72,518 listings starting at $1,000
Used Toyota 4Runner
254 Great Deals out of 20,494 listings starting at $1,800
Used Dodge Durango
273 Great Deals out of 22,704 listings starting at $1,200
Used Chevrolet Tahoe
549 Great Deals out of 29,235 listings starting at $1,699
Used Ford F-150
2,198 Great Deals out of 206,316 listings starting at $1,499
Used Chevrolet Silverado 1500
1,716 Great Deals out of 175,753 listings starting at $1,250
Used BMW X5
437 Great Deals out of 16,995 listings starting at $1,999
Used Jeep Liberty
244 Great Deals out of 7,310 listings starting at $995
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217

Used Cars For Sale

2017 Jeep Grand Cherokee Laredo 4WD For Sale
6,576 listings starting at $25,400
2016 Jeep Grand Cherokee Laredo 4WD For Sale
21 Great Deals out of 780 listings starting at $21,499
2015 Jeep Grand Cherokee Laredo 4WD For Sale
22 Great Deals out of 762 listings starting at $19,488
2014 Jeep Grand Cherokee Laredo 4WD For Sale
27 Great Deals out of 1,062 listings starting at $14,995
2013 Jeep Grand Cherokee Laredo 4WD For Sale
9 Great Deals out of 493 listings starting at $10,799

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.