Bad idle
Thread Starter
Junior Member
Joined: Apr 2020
Posts: 60
Likes: 4
Model: Cherokee (XJ)
Bad idle
My 2000 XJ has a bad problem with idle when sitting at a light for a couple minutes and RPMS on the tachometer always bounce around from the moment it starts up and it almost stalls out at idle after a few minutes and has a horrible hesitation to acellerate when the stall almost occurs at a light...
Fuel pressure is good at the rail just replaced TPS and IAC and o2 sensors every thing operates fine other than take off and idle
When I put my hand on the IAC while just turning the power on not starting the engine I dont feel anything
When I replaced all the sensors the problem goes away for about 3 hours then comes back any ideas? Im stumped beginning to think the ECM is bad
Fuel pressure is good at the rail just replaced TPS and IAC and o2 sensors every thing operates fine other than take off and idle
When I put my hand on the IAC while just turning the power on not starting the engine I dont feel anything
When I replaced all the sensors the problem goes away for about 3 hours then comes back any ideas? Im stumped beginning to think the ECM is bad
Last edited by Gator Dave; Aug 11, 2020 at 06:53 PM.
Junior Member
Joined: May 2020
Posts: 33
Likes: 5
Model: Cherokee (XJ)
Did you replace using Mopar IAC and TPS sensors? When I had idle problems,I went cheap and got what I paid for... continued idle problems. Read somewhere an easy way to test the IAC was to pull it out of the TB, turn on the ignition (don't start it), and look for the piston to move. Did this... And my new non Mopar didn't budge. I replaced with Mopar, and was good to go.
Thread Starter
Junior Member
Joined: Apr 2020
Posts: 60
Likes: 4
Model: Cherokee (XJ)
no I didnt replace with mopar origional they were so expensive I did t wanna do that and it not be the problem so I figured a 70$ BWD from advance auto would work for one day just to see my code said low voltage to the TPS so maybe there is a broken wire
Thread Starter
Junior Member
Joined: Apr 2020
Posts: 60
Likes: 4
Model: Cherokee (XJ)
Did you replace using Mopar IAC and TPS sensors? When I had idle problems,I went cheap and got what I paid for... continued idle problems. Read somewhere an easy way to test the IAC was to pull it out of the TB, turn on the ignition (don't start it), and look for the piston to move. Did this... And my new non Mopar didn't budge. I replaced with Mopar, and was good to go.
Member
Joined: Oct 2018
Posts: 242
Likes: 16
From: Indiana
Year: 1998
Model: Cherokee (XJ)
Engine: 4.0 Inline 6
Scroll to post #20. Go ahead and bookmark it/download it as it's a great resource and you may need it more than once.
Junior Member
Joined: May 2020
Posts: 75
Likes: 4
Model: Cherokee (XJ)
My 2000 XJ has a bad problem with idle when sitting at a light for a couple minutes and RPMS on the tachometer always bounce around from the moment it starts up and it almost stalls out at idle after a few minutes and has a horrible hesitation to acellerate when the stall almost occurs at a light...
Fuel pressure is good at the rail just replaced TPS and IAC and o2 sensors every thing operates fine other than take off and idle
When I put my hand on the IAC while just turning the power on not starting the engine I dont feel anything
When I replaced all the sensors the problem goes away for about 3 hours then comes back any ideas? Im stumped beginning to think the ECM is bad
Fuel pressure is good at the rail just replaced TPS and IAC and o2 sensors every thing operates fine other than take off and idle
When I put my hand on the IAC while just turning the power on not starting the engine I dont feel anything
When I replaced all the sensors the problem goes away for about 3 hours then comes back any ideas? Im stumped beginning to think the ECM is bad
Thread
Thread Starter
Forum
Replies
Last Post
jebmccall
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
Jun 7, 2013 08:08 PM
ken72
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
Dec 26, 2010 07:21 PM
LeRoy90laredo
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
Aug 9, 2010 03:56 PM
tmilford34
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
Nov 4, 2009 08:50 PM
simpleman101b
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
Oct 1, 2008 11:09 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)