I have a 96 cherokee classic and for some reason when i have eather the ac or the heat running while its in drive, the motor idels low then when i shut it off it goesback to normal and i replaced the blower motor and resitor im loseing my mind trying t figure this out please help.

 

hmmmm, I feel like mine does this as well, but only when I put the defroster on... I'll be interested to see what other people have to say on this issue.....

 

I need heat i live in chicago and its way cold.

 

i think the idle air control motor is supposed to idle the motor up when the ac is on.

 

I found out what was wrong the main computer has two grounds they have to be together they wernt so its done.

 

Glad to know that have figured it out! It just shows how a simple grounding can cause you a problem...