Stalling and rough idle problem.

340

Asked by Nov 09, 2011 at 08:50 PM about the 2002 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

My 2002 Grand Cherokee 4.0l recently started  having rough idle problems. I did a tune up..changed the plugs.....replaced the coil rail.....air filter.....gas filter. The idle is still rough and now it stalls suddenly. It has stalled while I was highway driving.....sitting at a light...ect. It doesn't seem to be the fuel pump as I can hear it come on when I turn the key. Anyone have any ideas what it could be?

Thanks!

Dolfan

10 Answers

3,005

If you can HEAR the fuel pump, then that might be the issue. Normally fuel pumps get really noisy when they are beginning to fail. Due to clogged fuel filters the pump fails soon after. Replace both or get the fuel pressure checked at the fuel rails on the engine. Other possible issues could be crank sensor or intake MAF sensor. Wouldn't hurt to take some MAF sensor cleaner to it and also clean out your throttle bottle. I think there is a idle control sensor in the throttle body near the butterfly valve. Check that too.

4 of 4 people found this helpful.
340

Thanks Matt. I changed out my cranksaft postion sensor. I got the error code off the odometer and AutoZone said it was the sensor. I just swapped it out so we'll see if it stalls again. If not I'll look into the fuel pump. Thanks again. I'll let you know how it goes.

4 of 4 people found this helpful.
340

I have had no more stalling or rough idling so I guess it was the crankshaft sensor. Thanks again for the response Matt.

2 of 2 people found this helpful.
3,005

You're welcome.

1 of 1 people found this helpful.
90

I had a similar problem with my 2000; finally solved with new fuel filter. the fuel filter is also the fuel pressure regulator.

9 of 9 people found this helpful.
50

Just so I understand, on a 2002 jeep Cherokee the fuel pressure regulator is inside the fuel filter ???

5 of 5 people found this helpful.
60

My 2004 grand jeep stalls out when I stop at a light what could it be

6 of 6 people found this helpful.
40

Ive the same problem .. just changed the crank sensor .. Still stalls and no break and steering also freezes .. Its very dangerous .. Sbody pls help . Can it be the mass sensor ??

4 of 4 people found this helpful.
40

I have a 1988 jeep cherokee n it has a rough idle n a miss. It starts up fine n sometimes the rpms well stay at 3000 rpms. I sometimes have to turn the engine off n back on for the rpms to drop down to abt 1000. Then it wants to lug down while im driving on the highway then it picks back up again

4 of 4 people found this helpful.

My jeepnhas done this a few times. It ended uo being the relay sensor or the throttle positioning sensor. Both are under 40 bucks and very easy to change.

Your Answer

Add photo

Related Questions

  • Stalling and rough idle problem. 10 answers

    My 2002 Grand Cherokee 4.0l recently started having rough idle problems. I did a tune up..changed the plugs.....replaced the coil rail.....air filter.....gas filter. The idle is still rough and now i...

    2002 Jeep Grand Cherokee Laredo 4WD

    -

    Maintenance & Repair

  • Rough idle and stalling 2004 jeep grand cherokee laredo 1 answer

    So today on my lunch break i drove 2 maybe 3 miles then parked for 30min to eat lunch, i left the car running all the way for 30min. i usually dont leave the car running. i turned the car off for 10...

    2004 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • jeep grand cherokee starting problem followed by rough idle and will not drive. 6 answers

    my jeep was running just fine since i bought it back in February, just today it started having problems starting, it would turn over a bit i would turn it off and then tried starting it a second tim...

    1999 Jeep Grand Cherokee Laredo 4WD

    -

    Maintenance & Repair

  • Rough idle smoking after running a while 2 answers

    cranked up it runs fine but after running for 30 minutes it will have a rough idle and smoke

    2002 Jeep Grand Cherokee Overland 4WD

    -

    Maintenance & Repair

  • Rough idle and little throttle response 4.0 inline 6. 1 answer

    Got gas at a marathon station, which I usually don't do, and then drove about 20 miles to school with no problems. After sitting in the parking lot ideling for about 20 mins it started to rough idl...

    2003 Jeep Grand Cherokee Laredo 4WD

    -

    Maintenance & Repair

Grand Cherokee

Looking for a Used Grand Cherokee in your area?

CarGurus has 72,540 nationwide Grand Cherokee listings starting at $1,200.

ZIP:

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 inuevafreak
inuevafreak
Reputation 2,100
#2 Tom Demyan
Tom Demyan
Reputation 1,890
#3 thejeepdoctor
thejeepdoctor
Reputation 1,770
View All

Related Models For Sale

Used Jeep Cherokee
357 Great Deals out of 40,176 listings starting at $1,500
Used Ford Explorer
914 Great Deals out of 63,691 listings starting at $799
Used Jeep Wrangler
272 Great Deals out of 15,789 listings starting at $3,795
Used Toyota 4Runner
222 Great Deals out of 19,181 listings starting at $2,300
Used Dodge Durango
273 Great Deals out of 21,020 listings starting at $1,500
Used Chevrolet Tahoe
593 Great Deals out of 33,019 listings starting at $1,500
Used Ford F-150
2,091 Great Deals out of 192,317 listings starting at $290
Used Chevrolet Silverado 1500
1,932 Great Deals out of 182,333 listings starting at $999
Used BMW X5
461 Great Deals out of 14,703 listings starting at $1,499
Used Chevrolet Camaro
372 Great Deals out of 31,226 listings starting at $2,500
Used Ford Mustang
683 Great Deals out of 44,470 listings starting at $1,500

Used Cars For Sale

2018 Jeep Grand Cherokee Laredo 4WD For Sale
37 listings starting at $40,085
2017 Jeep Grand Cherokee Laredo 4WD For Sale
8 Great Deals out of 7,099 listings starting at $25,000
2016 Jeep Grand Cherokee Laredo 4WD For Sale
13 Great Deals out of 501 listings starting at $21,970
2015 Jeep Grand Cherokee Laredo 4WD For Sale
22 Great Deals out of 747 listings starting at $18,599
2014 Jeep Grand Cherokee Laredo 4WD For Sale
21 Great Deals out of 995 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.