2000 OBW 2.5L My idle rpm's are "surging" . When at a stop , they will slowly settle down to the 500-550rpm range and right about when you thinking "oh my!? thats seems a little low." Something will bring them up (rpm's) to about 1000 and then the slowly settle back and the proccess repeats. Idle stablizer Valve?? Maybe, I have yet to get a manual . I'll pick up a chiltons or some such thing this weekend.

 

Side note: Is there a head bolt re-torque duration or specification??

 

 

Thanks

It's possible the idle air control valve is sticking. On the newer models they are on the throttle body, and can be removed & cleaned pretty easily.