1995 Grand Am 2.3 Idle Problem

My Grand Am is receiving a service engine light when the car is in park at idle. I receive an error code 35 which is the idle air control. I changed the IAC and it did not fix the problem. I also changed all my vacuum hoses and the oil/air seperator with no luck fixing the problem. Any suggestions???

I've been having the same problem for about a 9 months now. I changed the IACV four times and the problem still hasn't been resolved. Anyones suggestions who's encounterd this before sure would help.

What are you scanning it with to get these codes?

I am not sure what the scanner is called. I had it scanned on a Navy base. The machine is maybe 12 in wide and 8 in high. It reads all the info ie Idle RPMs, IAC, and more. I can actually watch the IAC number go up, down and then to zero. A few seconds later the engine light comes on. The idle is a little high between 1100-1200 and everything else is normal. I have received code 35 three times. Is that enough info? Thanks.