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95 Cherokee runs fine until it gets warm, then it runs rough???. ..

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Old Mar 25, 2017 | 07:50 AM
  #1  
Jason Killebrew's Avatar
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Default 95 Cherokee runs fine until it gets warm, then it runs rough???. ..

I have replaced the CPS, TPS distributor cap and rotor button??
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Old Mar 25, 2017 | 07:55 AM
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XJRed96's Avatar
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From: Midwest
Year: 1998
Model: Cherokee (XJ)
Engine: 4.0L
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try unplugging the oxygen sensor/ and see if it makes a difference if it does replace the oxygen sensor.
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Old Mar 25, 2017 | 04:12 PM
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BlueRidgeMark's Avatar
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From: Lost in the wilds of Virginia
Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
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Stop firing the parts cannon. It's an expensive, unreliable, and frustrating way to fix a car.

Let's think about this. What is different about how the engine is controlled when it's cold vs. when it's warm?

HINT: Closed loop vs. open loop.
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