Rough idle in gear

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01-22-2018, 01:12 AM

970xjsport

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Location: montrose,colorado

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Year: 1999

Model: Cherokee

Engine: 4.0l 242

Rough idle in gear

I did a search and didn't see any other thread... but my 99 sport idles rough while in gear and stopped.. now when i say idles rough..the motor seems to run fine... but the whole jeep starts to humm and vibrate almost like someone had a subwoofer and they are parked next to me.. as soon as i take off it goes away.. and as soon i put it in park or neutral it calms down 99% I've replaced numerous parts/sensors to no avail... I've tightened everything thinking it may be a motor mount or something of that nature and nothing has fixed it.. its not a consistent occurrence but it does this more often than not and it's getting awfully annoying.. has anyone else had anything that aounds similar to this?? Thanks!

Last edited by 970xjsport; 01-22-2018 at 01:13 AM. Reason: Misspelling

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01-22-2018, 07:38 AM

cruiser54

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Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Ever cleaned your throttle body? Start with that.

http://cruiser54.com/?p=60

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01-22-2018, 02:28 PM

970xjsport

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Year: 1999

Model: Cherokee

Engine: 4.0l 242

Quote:

Originally Posted by cruiser54

Ever cleaned your throttle body? Start with that.

http://cruiser54.com/?p=60

I haven't like pulled it apart and cleaned it since i put the motor in about 8000 miles ago but i have sprayed cleaner in there as per instructed on the can.. idk how well that even works to be honest

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