E5Farmer Posted March 10, 2022 Share Posted March 10, 2022 (edited) New to me 2012 CXU Mdrive with MP7. Truck starts, runs, drives fine. But when ever I come to a stop and set park brake it’ll start “surging” or “erratically idle” going from 600 to 700rpm. It does eventually work out if it. It will be idling at 650, set the park brake then immediately goes under load or bogs down to about 600 for maybe 1/4-1/2 second then let’s go and idles up to 700 then the process just continues, bogs down to 600 then “let’s go” and surges to 700 over and over. I tried disconnecting the throttle potentiometer behind the pedal but it continued. It does seem like it only does it after the truck is warmed up. I do have a video but it is too big to upload to here. thank you Edited March 10, 2022 by E5Farmer More details Quote Link to comment Share on other sites More sharing options...
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