Sep 21, 2015, 03:49 PM
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XJ Ask the Question Thread
Banned
Joined: Jul 2012
Posts: 91
Likes: 0
Ok so I have been having low idle problems plus stuttering and shaking. Also, when I press on the gas it will go slow then rev up and speed up rapidly. It will do that between 2-5 times then it will be normal. I can also feel like a clicking in the pedal when it revs and speeds up like that. So far I have cleaned iac, replaced tps, new wires, cap, rotor, and plugs (copper) so I'm thinking it could be a problem with either the coils, cat converter (maybe clogged? Could that cause it?), the cps (ill test that soon) the map sensor, or the iac (maybe need replaced?) Anyone have any ideas?
Member
Joined: May 2012
Posts: 203
Likes: 0
From: Gilbert, Arizona
Model: Cherokee
CF Veteran
Joined: Apr 2011
Posts: 14,553
Likes: 1
From: Carrollton, GA
Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output
In this article:http://www.naxja.org/forum/showthread.php?t=1046621
What o rings is he talking about? I need to fix mine and i need the right parts lol
Member
Joined: May 2012
Posts: 203
Likes: 0
From: Gilbert, Arizona
Model: Cherokee
Not sure about that... how'd it break/come off?
In this article:http://www.naxja.org/forum/showthread.php?t=1046621
What o rings is he talking about? I need to fix mine and i need the right parts lol
In this article:http://www.naxja.org/forum/showthread.php?t=1046621
What o rings is he talking about? I need to fix mine and i need the right parts lol
Sorry I'm not sure what O-rings he is referring to there.
My gasket was just old and brittle. It just crumbled apart when I pulle the 2 pieces apart. From what I could find it is a dealer part only, but gasket not sold separately. So got material to make my own.
CF Veteran
Joined: Apr 2011
Posts: 14,553
Likes: 1
From: Carrollton, GA
Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output
I found out what i wanted... Do you have a better pic of where it came off of the TB?
No, I don't lick fish.
Joined: Mar 2011
Posts: 11,169
Likes: 26
From: Northern Kentucky
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
Originally Posted by the_big_h
If the battery went totally flat, the ECM will have forgotten all its learned data. It will take a few start/stop cycles (normal operation) for it to re-learn the engine characteristics. It continues to learn for up to 50 start/stop cycles.
So it's normal, just keep driving it and it should be back to normal real soon.
Originally Posted by salad
Is your battery holding its FULL charge? I I recall correctly, a lot of dual purpose batteries aren't meant to be discharged that far, and can take a while to recharge. The surging bit sounds like a typical IAC/TPS problem but overall just sounds like your alt is dragging things down. When I left my interior lights on one night all winter (two melted holes in snow on roof: uhoh) I had to keep the pedal down for a few minutes as it just wouldnt idle. Didn't behave right for the next couple of days, but cleared up afterwards.
I suspected what the big h said, so I'm just gonna give it a couple of weeks and see if the ecm relearns and returns to normal.
Banned
Joined: Jul 2012
Posts: 91
Likes: 0
Originally Posted by jeepbby123
Ok so I have been having low idle problems plus stuttering and shaking. Also, when I press on the gas it will go slow then rev up and speed up rapidly. It will do that between 2-5 times then it will be normal. I can also feel like a clicking in the pedal when it revs and speeds up like that. So far I have cleaned iac, replaced tps, new wires, cap, rotor, and plugs (copper) so I'm thinking it could be a problem with either the coils, cat converter (maybe clogged? Could that cause it?), the cps (ill test that soon) the map sensor, or the iac (maybe need replaced?) Anyone have any ideas?
CF Veteran
Joined: May 2011
Posts: 2,135
Likes: 1
From: Santa Rosa, California
Year: 1987 Comanche,1990
Model: Cherokee
Engine: 4.0L Renix
My xj came without a t-stat(ran it for 6 months) and could that be why I get terrible mileage. I replaced but I get that same mileage. Could that have damaged my engine? I was reading a thread about not running a t-stat and thought this could be my problem.
CF Veteran
Joined: Nov 2010
Posts: 15,581
Likes: 8
From: some small town oregon
Year: 1989
Model: Cherokee
Engine: 4.0
Originally Posted by jeepbby123
O I forgot to mention fuel pump is on my list of things to check. And idk I got the jeep last summer.
CF Veteran
Joined: May 2011
Posts: 2,135
Likes: 1
From: Santa Rosa, California
Year: 1987 Comanche,1990
Model: Cherokee
Engine: 4.0L Renix