Hey guys just got home and pulled in the driveway and the idle was ok at first then started acting up. It would fall under normal then jump up a little higher than normal then down and up and down. Then it seemed to smooth out some but still fluctuated a bit and then it started to get worse again. What could be the culprit here? Thanks in advance

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Anyone got any ideas? It did it again tonight it will jump from idle to about 1000 then down to 650 or so then back up and down. Could a sticking ipr have anything to do with this or any other ideas?