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XJ Ask the Question Thread
11-13-2011, 12:30 AM
#7876
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Join Date: Sep 2010
Location: Mercer County, NJ
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Originally Posted by mikedeezxj
So i have an 89 4.0 xj and it has a high idle between 1100 and 2000 ive replaced the idle air control (iac) and the throttle position sensor no change... Im not seeing any vaccume leaks sprayed with carb cleaner nothin... Any suggestions? Could this be 02 sensor or sparkplugs i wouldnt think so but im lost now please help!
11-13-2011, 12:34 AM
#7879
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Location: some small town oregon
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Year: 1989
Model: Cherokee
Engine: 4.0
Originally Posted by mikedeezxj
I cleaned throttle body it was gunked up pretty bad at some points it will idle at around 7 or 800 but not often throttle cable seems to retract fine
11-13-2011, 12:51 AM
#7885
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Join Date: Sep 2010
Location: Mercer County, NJ
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Originally Posted by mikedeezxj
So i have an 89 4.0 xj and it has a high idle between 1100 and 2000 ive replaced the idle air control (iac) and the throttle position sensor no change... Im not seeing any vaccume leaks sprayed with carb cleaner nothin... Any suggestions? Could this be 02 sensor or sparkplugs i wouldnt think so but im lost now please help!
Originally Posted by sycoglitch
Have you seafoamed her lately
11-13-2011, 01:18 AM
#7887
CF Veteran
Join Date: Sep 2010
Location: Mercer County, NJ
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Originally Posted by mikedeezxj
Seafoamed about 2 weeks ago
There has to be a vac leak in the system somewhere. I don't know too much about the Renix systems but worse case detach a vac line and see if the idle goes higher. Are you able to shift into 4wd. Just trying to throw ideas for anyone can use
Last edited by sycoglitch; 11-13-2011 at 01:24 AM.
11-13-2011, 01:29 AM
#7888
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Originally Posted by sycoglitch
Wow, ok that sucks. Your rig isn't making this easy. SF helped my idle. Also changing my old Cat did too.
There has to be a vac leak in the system somewhere. I don't know too much about the Renix systems but worse case detach a vac line and see if the idle goes higher. Are you able to shift into 4wd. Just trying to throw ideas for anyone can use
11-13-2011, 01:30 AM
#7889
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Originally Posted by sycoglitch
Wow, ok that sucks. Your rig isn't making this easy. SF helped my idle. Also changing my old Cat did too.
There has to be a vac leak in the system somewhere. I don't know too much about the Renix systems but worse case detach a vac line and see if the idle goes higher. Are you able to shift into 4wd. Just trying to throw ideas for anyone can use