I am using my camaro as a daily driver my girlfriends car was totaled and she is haveing problems finding a new car in her price range so she is useing my lancer.

My camaro is idleing low below 750 rpm then it will go upto 1000 then down to 500 and back up the whole time i am at idle. I cleaned out my TB and IAC passages. I also reset the computer and that did not help. Do you think the screw in the TB is backing out?

 

could be anything. check for vacuum leaks, check the voltage on the tps (.55v i believe is the best)... usually a vacuum leak though.

anyone else?

 

My friends car used to do that. It was a vacuum leak. You should be able to hear it.

 

yea i would test the tps as well,,,,could be somthig as simple as a cracked hose,,,,also just a thought but yer a/c is not on at same time is it?

 

Does it with both the AC on and off more so when it is off. I think it may be a vac leak but i dont know where since I can not hear it hissing anywhere. I will also check my TPS this weekend.