I have an 03' cavalier with a 2.2L ecotec, when i get off of the highway my engine idles at around 2500-3000 rpm's when i push in the clutch and when i am in neutral. what could be the cause of this problem? There is also idle surge sometimes when i am stopped and in neutral/push in the clutch. there is a thread about this happening to 02' cavaliers but i don't know if it could be the same electrical connector that connects the engine fan to the engine. is this generally the same problem?