I have a 2001 Cherokee Sport with a 4 liter and this is my problem. When you are driving along sometime you will feel the jeep kinda buck a little bit. When you feel the buck and you look at the tack you can see the rpm's jeep from like 2000 to 2500 or 3000 and back down again. My thought is maybe a bad or going bad TPS. Does anyone have any ideas what would cause this problems?

 

Im not to great with cars, but my dad works on em and when he had a car jump like that it was something related to the transmission and when it would shift gears

 

The tranny seems to shift ok but i will look into and get it checked. Thanks

 

Try the tech tread,thell know more.

 

when my jeep's rpms were going up and down like crazy, it turned out to be an OC sensor going bad.

 

yea it could either be what they're saying or miss firing and if so try putting new spark plugs in it cause my jeep was miss firing bad like when you stomped on it it buck like crazy so try spark plugs if it still happens