I seem to be having idling problems as many of you. The car does not shut down completely but the RPMs go up and down when I am about to shut the engine down and park. It seems to run better when the A/C is on. I usually shut the A/C down before turning the engine off, right after I turn the A/C off is when I notice the RPMs going up and down.

I changed the gas filter and tried using premium gas but it doesn't help. I checked the MAS plug, since I recently changed the bulbs, and it was also fine.

I unplugged the MAS and ran the engine to see what happens and now is WORSE because the check engine light went on. I put the plug back but the check engine light remains ON.

How do I get the Check Engine light back OFF? Is it possible that I burned a fuse??

Please help?