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This recently just started happening. Whenever I come to a stop light or anything and the commander is in drive or in park the RPM needle will start to jump up and down a little bit.

Any idea what is causing this???
 

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Try replacing the throttle position censor, its on the intake, mine would fluctuate when i would start my commaner up all the time then calm down, now i don't have that problem anymore.
 

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I'm having the same problem but it only does it when the AC is on. I already replaced the idle air control valve so I know that's not the issue.
 

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I'm having the same problem but it only does it when the AC is on. I already replaced the idle air control valve so I know that's not the issue.

You should try replacing the Throttle position cesnor that is just 38dlls so not that expensive, give that a try. And thank you jasmat for the diagram.
 

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I actually just picked one up for ****s and giggles. Cost $32. It probably needs to be replaced anyways even if it doesn't fix the idle problem. I have almost 133,000 miles on my jeep and its never been replaced. I'll install at tonight after work
 

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Just swapped it out. Took only a few minutes. I'll let you guys know if it fixes the issue
 

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It's looks like the Throttle Position Sensor fixed the idling issue I was having.
 

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Yeah me to cause it was really starting to piss me off. I love AC in the summer and was sick of the idling issue when ever the AC was on. Not sure how they relate but it fixed the problem
 
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