ok i have a 200 xj i changed the oil plugs airfilter just a normal tune up and at a idle it is kinda rough and vibrates a little not much and the rpms bounce a little bit to it has the coil packs not wires so idk if thet is the problem and if so how could i check it has 125000 on it

 

i own a 200 xj with 125000 miles and it idles weard it vibrates a little and thr rpms bounce some i changed the plugs oil and air filter wat else can i do or is the coild pack bad

 

i know a big problem on ford f450s is that condisation builds inside the coil pack. try remomeing them and air drying them in ur house for a day or two. that what i always do when a customer is to cheap to have them fixed properly.

 

Try cleaning the throttle body, especially the IAC.

 

i cleaned the throtal body and it still does it iv done everything i no to do

 

Have any error codes popped up?

 

no nothing pops up no codes or nothing but when ur goin down the road its perfict its just at a idle its weard

 

I know nothing about the coil pack era Jeeps but it sounds like a IAC problem. Take that off and clean it carefully and watch that you don't bend or damage the pintle. re-install it and see if it makes a difference in your idle.

 

mine does the same thing randomly i pretty sure it lies within the coil packs

 

i wish there was some way of checking

 

spark plugs gapped correctly?

 

check for any vacuum hoses you may have knocked off or inadvertently broken during your maintenance.

 

hmmm check to see if your MAF or anything is disconnected on the TB when you cleaned it..

 

You could always grab the multimeter and ohm out the coil packs...

 

how do you use the meter on the coil pack its one long strip