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HEy guys
My car was really wierd today and had a idle surge and I am hoping you guys will be able to help me out here. Well I got a 03 Coupe with about 20K on the clock, manual. Today after work I started the car and let it sit for a bit (it's cold here in Nj). Well after about a minute or two I backed up a car about 50foot to let my co worker out. After that I was just sitting on the car listening to music. Well I noticed the rpm meter was flickering in between 1400-1600rpm. And then all of a sudden it dropped and the temp gauge went up a notch. Well it was ideling and then it bounced to 2000rpm so i thought i had my foot on the gas and i romved my foot but it still stayed at 2000rpm then I tapped the gas a bit so see if it would fall and it did, then it went put again. The engine is pretty warm at this point so put it in first and the car went back to normal idle well when i came to stop at the stop sign about 150foot down the rpm jumped back to 2000rpm so i pulled to the site and shut the car off and restarted. After I restared it didn't act up again. On the mod's I got a AEM CAI with bypass, that's it. I hope you guys will be able to shine some light on the subject. Thank you in advance for all the help.

 
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my idle and rpms have been fuct for a while. it will idle low @ 400-500rpms and then it will jump to 1200rpm(when heat is on or defrost) then drop then go back to 1200rpm or so. SOmetimes I have it in neutral and it will do same thing. I have an elictrical overload code(p1198 or 1298 can't remember) but I havn't done anything about it. Im gonna swap the motor come spring so Ive given up on the whole rpm jump thing.

 
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Any other opinions or advices on the problem. Thanx