my 1995 camaro with a 3.4L V6 starts up fine and runs good as long as i drive it. if i turn it off and turn it on it idles rough and backfires. it seem to run fine above 2000rpm but will eventually die out at idle. i replaced the plugs and wires and cleaned the idle control motor and did not help. check engine comes on after driving for awhile but goes away as i turn the car off. i haven't pulled the codes yet. i was looking to see if anybody has had this problem or any advice before i take it in. anybody have any ideas what could cause this?

 

Could be the EGR valve.