2003 Jeep Cherokee Idle at start up 2003 GrandCherokee Lare

EDEPALMO

MEMBER
2003 JEEP CHEROKEE
6 CYL
4WD
AUTOMATIC
88,500 MILES

Sometimes at start up of Engine at least 50% of the time. The Engine Idle speed at start up is 2000 RPM or a little above.
If you turn the ignition off and restart it will be at the normal Idle of around 1500 RPM
I have changed the Idle positioning sensor twice, still have the same problem

6 Replies

JACOBANDNICKOLAS

MECHANIC
108,205 POSTS

Has the check engine light come on? Have you checked for vacuum leaks?

Let me know.

Joe

Was this

answer

helpful?

Yes

Wednesday, February 10th, 2010 AT 1:03 AM

EDEPALMO

MEMBER
4 POSTS

Joe No the check engine light is NOT on. I've checked for Vacuum leaks, but found none yet

SPONSORED LINKS

Was this

answer

helpful?

Yes

Wednesday, February 10th, 2010 AT 7:35 AM

EDEPALMO

MEMBER
4 POSTS

[quote="Jacobandnickolas"]Has the check engine light come on? Have you checked for vacuum leaks?

Let me know.

Jo
No check engine light isn't coming on. I have checked for vacuum leaks. Have not found any.

Was this

answer

helpful?

Yes

Wednesday, February 10th, 2010 AT 8:06 AM

JACOBANDNICKOLAS

MECHANIC
108,205 POSTS

I feel there is a problem with the throttle position sensor, but I can't be sure without a trouble code.

Was this

answer

helpful?

Yes

Thursday, February 11th, 2010 AT 4:02 PM

EDEPALMO

MEMBER
4 POSTS

Joe; The Service Engine light is not on. Put tester on and can't get any codes at all. In my original post I said I replaced the Idle positioning sensor twice. I meant I replaced the Throttle positioning twice. It still does the same thing.