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I have a 2011 Polaris ranger 800 xp and recently it started to idle up and down every now and then. I will be just sitting there and rpms go up like I hit the gas the goes back to normal after a couple seconds. If you just let it sit there it will do go up and back down. After a few seconds it will do it again. Sometimes it won’t do it at all. Any idea on what it could be.
 

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Cole, 2011>>>>>>>>>>>800>>>>>>>>>>>>>> IAC harness bad..

Some symptoms of a bad Idle air control motor wiring harness are engine will not stay idling, idle will be too high or to low. Engine will die when letting off the gas.


This harness fits All 500cc, 550cc, 570cc, and 850cc - 1000cc machines as well as some 800cc and up Rangers.


Please do a visual comparison to make sure you are ordering the correct part.

 
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2015 Polaris ranger 570 XP
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In addition to the above a vacuum leak can cause erratic idle.
 
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