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Not sure how to fix...

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Old 08-07-2010 | 09:11 PM
  #1  
jrh97007's Avatar
jrh97007
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From: Beaverton
Year: 1988
Model: Cherokee
Engine: 4.0
Default Not sure how to fix...
About a month ago I bought an 88 Cherokee for $500.00. It ran rough but after an oil change it sounded much better. I changed out all the plugs, wires, air filter, alternator, starter, and serpentine belt. I also changed out all six injectors and the exhaust started spiting black smoke. Also after about five minutes the engine idles at 100 to 200 hundred rmp and sometimes dies. I replaced the o2 sensor and re-set the computer so I think it is something simple I just don’t know what. Any ideas would be greatly appreciated. Thanks, Joel.
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Old 08-07-2010 | 09:45 PM
  #2  
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superj
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From: corpus christi, texas
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 I6
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how about the throttle position sensor on the throttle body?
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Old 08-07-2010 | 09:50 PM
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jrh97007
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From: Beaverton
Year: 1988
Model: Cherokee
Engine: 4.0
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I have not tried that. I will though, I also thought about cleaning out the throttle body and mabey puting a spacer in there.
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Old 08-07-2010 | 10:26 PM
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mike albo
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From: Loomis,California
Year: 1987
Model: Cherokee
Engine: 242 inline six
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try cleaning the IAC,if that doesn't help it needs to be replaced
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Old 08-07-2010 | 10:43 PM
  #5  
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jrh97007
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From: Beaverton
Year: 1988
Model: Cherokee
Engine: 4.0
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I will give that a try, thanks.
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