This sounds like a bad contact, bad wire or defective temperature sensor somwehere. Would be intersting what resistance you can measure when idle is that high. Elvis Yes. Microswitch is fine, probed it, no problems. UPDATE: While frustrated, we pulled out the manual and did some reading on the idle speed motor. When the car's valley was cleaned and redone, the speed motor was installed backwards. So i went ahead and just corrected that problem. Now the car was warmed up, and idle was set properly. Took the car out for a test drive. For the first half hour of the drive, the car operates 100 percent normal... idle is normal. Then... when slowing down, the idle suddenly jumped a couple hundred rpms, and then settled down again. Odd i thought, but just kept watching. Got on the highway, all ok. Went to go downshift for an offramp, the car is back up at 3krpms! Pulled over, couldnt get the car back to idle normally. Started to drive back home, back on the highway, every time i clutch, the engine keeps hovering around 3k rpms. Make the turn off the off ramp and over some railroad tracks...idle goes back to normal!!! the last 7 minutes of the drive are normal. Pull into the yard, rev the car to 3k and hold for about 10 seconds, the car is FINE...no surging, no rough idle...nothing. Decide to keep her parked and unplug the battery for the night. Start car this morning, all 100% normal. Drive car for about 3 hours in city traffic, no highway...normal except a few times the idle surges about 400 rpms and then returns... usually when clutching...did this about 4 to 7 times. Then, when coasting, if you go over a bump in the road like a rail road crossing, the idle will surge once again. Mike Hackey To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/