My wifes 01 Cherokee sport occasionally idles low normal but now its misfire randomly, ie.. entire vehicle shakes at stop lights, may stall sometimes,

 

Sometimes it goes away completely for months, now its back. My code reader shot the codes for random misfire. From what I gather it could be caused by a dirty throttle body, bad plugs, coils. And everything in between down to a soiled battery contact. Any advise on where to start?

 

Not sure if it is the same problem I had because from what I hear it can be a lot of things. But I used some throttle body cleaner and cleaned it up while it was turned off on a warm day after that I started it and sprayed some while it was running and revved it a little bit for awhile kind of intermittently spraying and revving but that seemed to fix my problem. Like I said though from what I hear that can be a lot of different things. Spark plugs, wires, injectors, throttle body, rotor/cap, and thats really all I can think of at the moment.

 

I've had the same problem for the last few months. Thinking about swapping out injectors first since I've already done a tune-up...

 

Injectors aren't too bad to swap out but can be time consuming.

 

Always start with new plugs for this. The 00-01 like the NGK plug with the distributorless ignition. Gapped to .035

Then see where you are at.

Simple stuff first. Always.