|
|
|
|
| Author |
|
|
Registered
Join Date: Mar 2011
Location: Santa Monica, CA
Posts: 293
|
'99 Jeep Cherokee not idling
My son has a '99 Jeep Cherokee with the inline 6 that is acting a little funky. From time to time it will die at idle. As long as I have the revs above idle it's fine. And once it warms up it does fine. Do you guys think this is a fuel pump or fuel filter issue? I do not have a gauge to determine fuel pressure.
Thanks in advance for the suggestions. |
||
11-14-2014, 10:21 AM
|
|
|
Registered
Join Date: Oct 2003
Location: Michigan
Posts: 14,093
|
Check engine light on? If so, read the code or codes to get a starting point.
Short of that I would try cleaning the MAF sensor, if equipped as well as checking for loose broken vacuum lines. Air filter clean? EDIT--I did a search on the web and found that it COULD be the Idle Air Circuit sensor.
__________________
1981 911SC ROW SOLD - JULY 2015 Pacific Blue Wayne Last edited by Oh Haha; 11-14-2014 at 10:34 AM.. |
||
|
11-14-2014, 10:25 AM
|
|
|
Registered
|
Throttle position sensor dirty?
__________________
Brent The X15 was the only aircraft I flew where I was glad the engine quit. - Milt Thompson. "Don't get so caught up in your right to dissent that you forget your obligation to contribute." Mrs. James to her son Chappie. |
||
|
11-14-2014, 11:02 AM
|
|
|
Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,860
|
First place I would look is on the side of the intake manifold, there two vacum lines that are connected there, and I see them leak all the time. I think there are 90 elbows on them that lead to plastic tubing, but you can easily cut them off, and make a repair with straight vacum tubing .
If no vacum leaks are found, I would check, and clean the throttle body, then re set all adaptives . Not sure, if you can do this without a scanner, but , after you clean the throttle body, maybe try disconnecting the battery for 10 minutes or so, and then let it re-learn how to idle. Keep us posted, this should be an easy one.
__________________
No left turn un stoned |
||
|
11-14-2014, 11:08 AM
|
|
|
Registered User
Join Date: Jan 2013
Posts: 1,724
|
I had a 99 Grand Cherokee Laredo with 4.0l that had a similar problem. Would not start without keeping foot on gas and would not idle. Throttle position sensor was bad.
Usually a dying fuel pump can be temporally corrected by banging on the fuel tank with a rubber mallet (near the fuel pump location.) Dying fuel pump is usually precipitated by a more persistent louder whine from the pump. Clogged Fuel filter will usually not clear itself up.
__________________
bunch of random cars and bikes. |
||
|
11-14-2014, 11:49 AM
|
|
|
Registered
Join Date: Mar 2011
Location: Santa Monica, CA
Posts: 293
|
Thank you guys.
I'll try it out this weekend and let you know how it goes. |
||
|
11-14-2014, 11:57 AM
|
|
|
|
Registered
Join Date: Oct 2011
Posts: 338
|
Also clean the throttle body. Gunk builds up around the butterfly and the IAC motor cant keep up at cold idle.
|
||
|
11-14-2014, 12:04 PM
|
|
|
Registered
Join Date: Sep 2001
Location: Dismal Nitch, AZ
Posts: 9,042
|
NAXJA Forums -::- North American XJ Association - Powered by vBulletin
. Threads: 301,568, Posts: 3,691,870, Users: 78,592
__________________
Don . "Fully integrated people, in their transparency, tend to not be subject to mechanisms of defense, disguise, deceit, and fraudulence." - - Don R. 1994, an excerpt from My Ass From a Hole in the Ground - A Comparative View |
||
|
11-14-2014, 09:12 PM
|
|
|
....
Join Date: Feb 2008
Posts: 18,872
|
Every XJ that i have owned would stumble the idle once idling for longer then 5 or so mins. Very common.
I would replace the fuel filter as they are only 10 bucks at napa.
__________________
dolor et pavor Copyright |
||
|
11-14-2014, 10:31 PM
|
|
|
Registered
Join Date: Dec 2005
Posts: 3,384
|
Clean throttle body. Make sure you get no fluid into IAC and TPS. Most likely need a TPS as well but you can try cleaning IAC area well. CPS can cause stalling but not only at idle - it would happen all over the powerband but mostly when hot and no airflow (idling). CPS failure would be my second guess with first being TPS.
|
||
|
11-15-2014, 06:08 AM
|
|
|
Registered
Join Date: Mar 2011
Location: Santa Monica, CA
Posts: 293
|
Cleaned the throttle body and IAC. So far so good.
It was pretty dirty. Thanks again for all the input. I really appreciate it. |
||
|
11-15-2014, 03:43 PM
|
|
|
You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,931
|
Quote:
Old school. |
||
|
11-15-2014, 10:47 PM
|
|
|
