i have a 2000 jeep Cherokee and it has 176,000 miles on her never really had ant issues mechanically besides the CPS taking a poop on me but now I got a issue with a miss or stumble at idle the jeep always starts and runs perfect but when im at a stop light the idle studders and you can feel the jeep shaking I don't know where to start

 

Take your injectors off and give them a good cleaning.

 

okay ill try that the check engine light is on for a bad o2 sensor I wasn't sure if that would cause a miss at idle or not?

 

a bad o2 sensor can cause a lot of issues.. i would get that fixed and then see if your idle issue still exists..

you also have the year model that comes with a notorious bad cylinder head... the 0331

do a google search on that head... you will come up with a ton of information and things to check

 

this. if its not your upstream o2 sensor id be shocked. get a good OEM one, the cheapo's are prone to failure.. and do be wary of your engine temps. the 0331 has a weak spot between cyl. 3 and 4 that cracks when overheated..

 

Ok, well that's kind of important info that you left out there.

Yes, replace that. I like NGK o2 sensors.

 

An O2 sensor code does not automatically mean you replace the sensor. What is the exact code?

 

This.

 

Yup. Gotta have the exact code; with OBD the devil is in the details.

Also, how many miles are on your spark plugs? Can't forget the basics....

 

Have you noticed any unexplained antifreeze loss?

 

could be coil pack. i had replaced 3 coil packs in my old 2001