Question about 2000 Jeep Grand Cherokee

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IDLE IS SURGING,START IT AND IT GOES TO2000 RPM COMES DOWN TO 1000 RPM,GOES BACK UP TO 2000RPM THAN COMES DOWN TO AROUND TO1000 THAN BACK DOWN TO 600 RPM, I HAVE CHANGED THE idle sensor motor at a cost of 90.00,it wasn;t the probolem,so i;m down almost a hundred dollars plus another 100$ to spray tjhe valve body thanks

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  • Jeep Master
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An exhaust leak ahead of the O2 sensor can cause this. Air leaking in gives it an inaccurate reading. Check ahead of the sensors for telltale black sooty streaks at your exhaust joints and tighten any you find loose. You can temporarily cover any small holes with some muffler tape as well. Hope this helps.

Posted on Aug 03, 2010

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Posted on Jan 02, 2017

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