626 High Idle
 

Hello all... I am having a problem with 97 626 2.5L... When idling the engine will start rev up from 750rpms to 2750-3000rpms... sometimes it will idle down quickly, other times it will idle down after roughly 30 secs... had the codes pulled 1) IAT sensor circuit malfunction; 2) cylinder 3 misfire; 3) Input/Turbine Speed sensor A circuit malfuction... I had the codes cleared, changed plugs, PVC and air filter.. drove the car for abt 125 miles; car continued to idle high at times; on way to work made a stop for abt 30 min; started the car; it was idling rough... went to take off from the traffic light car hesitated, check engine light came on again; had codes pulled again; random/multiple misfire again; change plugs again (may have gapped them wrong the first trime; still revving up... what do I do now???