46wl

hello, my 2001 Cherokee sport 4.0 auto had not been driven for a week , ran fine then, I tried to start it today and it started but wont idle. as soon as it starts it stalls when I get off of the gas, if I step it up with the gas pedal it seems to run , not missing or rough but not very drivable like that. any ideas? Dave

Roler

A week is not that long.

A few ideas:

Have battery checked
Clean IAC
Clean throttle body, especially around valve/plate
Check fuel pressure
Let us know.

Dave51

Error codes?

bread_bird

had the same issue on my 99. checked under the hood, battery clamps were a bit loose and the posts were pretty gunked up. cleaned/tightened them and it started idling just fine

Roler

Good thoughtI always assume grounds cleaned and connections have been checked.

46wl

hello, I cleaned the throttle body and plate , fuel pressure is 45 psi . still no idle. probable should check the power at the iac motor . any one know what they should be ?

country2

Wondering...you didn't have a dead battery prior to this did you? Mine will do this if my battery dies until it relearns.

Roler

Did you clean the IAC as well as suggested?

To answer your question: I'd reckon the IAC has the 5 Volt reference going to it like most sensors.

46wl

do I need to remove the iac motor to clean or just squirt cleaner and air through the slot in the throttle body?

EZEARL

Here you go:
http://cruiser54.com/?p=60

Roler

No better to just remove it ( 2 torx screws iirc) and clean it with parts cleaner and a little brush. Don't go all crazy on it just brush it till nice and clean, especially the 'rod'.

46wl

today I took off the throttle body cleaned it more thoroughly, took off the iac motor cleaned it , then reassembled it all and the jeep seems to idle good . thanks for all the help Dave

EZEARL

Good deal!

Roler

Thanks for getting back and good to hear the suggestions worked out. That makes this a thread with closure, which is always good.