Jeep Grand Cherokee missing

Reply

  #1  
Old 10-03-02, 12:37 PM
marcof
Visiting Guest
Posts: n/a
Jeep Grand Cherokee missing

I have a 1994 Jeep Grand Cherokee that misses. I had an exhaust manifold crack and replaced it. Now the jeep may run
for a couple hours or just a few minutes and it starts missing.
The check engine light comes on when this happens. The codes are 23, 27, 42, which suggest it is in the gas. But I was wondering if maybe the oxygen sensor could make it do this. I have checked for vacuum leaks and such and found none. Any
advice will be appreciated.
 
Sponsored Links
  #2  
Old 10-03-02, 01:09 PM
Joe_F
Visiting Guest
Posts: n/a
Check the links and posts below in my signature file.

Enlighten us on what those code descriptions are and we can help a little bit more.
 
  #3  
Old 10-03-02, 01:37 PM
marcof
Visiting Guest
Posts: n/a
error codes

The error codes are 23....Air charge or throttle body temperature vottage. 27...Injector # 1, 2, 3 control current and peak current not reached. and 42...Fuel pump or no auto shut down relay voltage sent at controller. I have changed the relay so I don't think it iis the problem. Thanks
 
  #4  
Old 10-03-02, 04:58 PM
Member
Join Date: Dec 2001
Posts: 2,538
make sure nothing has been left unplugged like the air charge temp sensor,injectors etc, did you remove intake when changed exhaust header, is this a 6 cylinder?
then disconnect the battery for atleast 30 seconds then reconnect and drive vehicle until check engine light returns then recheck your codes im sure that not all of them will come back, and start with the code or codes that returned.
 
  #5  
Old 10-04-02, 10:33 AM
marcof
Visiting Guest
Posts: n/a
I ckecked the plugs and everything seems to be right. The jeep is a 4.o L 6 cylinder. The error codes all came back after disconnecting the battery and running the vehicle. And yes the intake was removed to change the manifold.
 
  #6  
Old 10-04-02, 05:28 PM
Member
Join Date: Dec 2001
Posts: 2,538
i would suggest taking to shop and having diagnosed may have pcm or wiring problem a shop will be able to scan and actually see the readings off the air temp sensor and assuming they can see the vehicle missing determine if it is losing injector pulse to some of the injectors and if so be able to test the wiring from injector to pcm and determine what the problem is.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes