Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

Idle problem. Gets really shaky after warming up.

Thread Tools
 
Search this Thread
 
Old 03-22-2013, 08:49 AM
  #1  
Junior Member
Thread Starter
 
AnthonyZ28's Avatar
 
Join Date: Feb 2012
Location: Texas
Posts: 68
Likes: 0
Received 0 Likes on 0 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 I6
Default Idle problem. Gets really shaky after warming up.

Ok, so I have this problem. My idle drops after warming up and everything gets really shaky when it drops. It starts fine, and idles fine. But after driving it around, parking it, it starts to drop to around 600. It normally idles right at 1000. It kinda acts like it's going to die, but then saves itself. And when I say shaky, I mean the engine is shaking. I can feel it in my AX15. The shaking carries through about 2000 rpm, after that it seems to level out.

Also the same day I had a problem with this, I had trouble getting gas. I was almost empty, but when I tried to fill it up, the pump clicked as if it was full. I managed to get in a gallon and drove home. Yesterday I filled up just fine.

I've read things about this possibly being the o2 sensor? Possibly fuel pump? Not too sure about this one.
Old 03-22-2013, 10:57 AM
  #2  
Former Sponsor
 
Morris4x4Center's Avatar
 
Join Date: Mar 2011
Location: Pompano Beach, FL
Posts: 1,109
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by AnthonyZ28
Ok, so I have this problem. My idle drops after warming up and everything gets really shaky when it drops. It starts fine, and idles fine. But after driving it around, parking it, it starts to drop to around 600. It normally idles right at 1000. It kinda acts like it's going to die, but then saves itself. And when I say shaky, I mean the engine is shaking. I can feel it in my AX15. The shaking carries through about 2000 rpm, after that it seems to level out.

Also the same day I had a problem with this, I had trouble getting gas. I was almost empty, but when I tried to fill it up, the pump clicked as if it was full. I managed to get in a gallon and drove home. Yesterday I filled up just fine.

I've read things about this possibly being the o2 sensor? Possibly fuel pump? Not too sure about this one.

there's a Idle Air Solienoid in the side of the throttle body... pull it out, clean it up with some carb cleaner and a rag, and reinstall.. (hopefully this can help) Name:  3bd047a9.jpg
Views: 51
Size:  37.6 KB
Old 03-22-2013, 11:22 AM
  #3  
Member
 
97jeepxj40's Avatar
 
Join Date: Nov 2011
Location: the cold, wet UK
Posts: 158
Likes: 0
Received 0 Likes on 0 Posts
Year: 1997
Model: Cherokee
Engine: 4.0
Default

Originally Posted by Morris4x4Center
there's a Idle Air Solienoid in the side of the throttle body... pull it out, clean it up with some carb cleaner and a rag, and reinstall.. (hopefully this can help)
Yup - this cured mine which had the same symptoms. Just be careful with that pintle when cleaning!
Old 03-22-2013, 11:29 AM
  #4  
Junior Member
Thread Starter
 
AnthonyZ28's Avatar
 
Join Date: Feb 2012
Location: Texas
Posts: 68
Likes: 0
Received 0 Likes on 0 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 I6
Default

Unfortunately, I have already done that. One day I removed the throttle body and cleaned all of that.
Old 03-22-2013, 01:50 PM
  #5  
Seasoned Member
 
Muaddib420's Avatar
 
Join Date: Jun 2012
Posts: 485
Likes: 0
Received 2 Likes on 2 Posts
Model: Cherokee
Default

Could be a misfiring spark plug. Change them lately?
Old 03-22-2013, 02:43 PM
  #6  
Seasoned Member
 
ss427ci's Avatar
 
Join Date: Dec 2009
Location: Colorado Springs, CO
Posts: 460
Likes: 0
Received 0 Likes on 0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0L
Default

Possible causes:

Clogged air filter
Dirty throttle body
Dirty IAC valve
Dirty IAT sensor
Clogged fuel injector
Corroded electrical connections
Corroded ground wire connections
Bad spark plugs
Dirty points in distributor
Cracked spark plug wires
O2 sensor/s
Vacuum leak

That's just off the top of my head, not an all inclusive list per say. But some things to check out for sure.

Last edited by ss427ci; 03-22-2013 at 03:18 PM.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Calikingcrawler
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
09-07-2021 07:14 AM
Jamesmon4
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
08-16-2016 09:04 PM
Tcq192
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
10-23-2015 09:25 AM
Programbo
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
21
09-26-2015 11:32 AM
sikkev
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-05-2015 11:33 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: Idle problem. Gets really shaky after warming up.



All times are GMT -5. The time now is 04:33 PM.