Not sure if its really a Comptech S/C issue, but normally when you start the car the air pump kicks on and the idle may drop a bit. For the last few months on my car, the idle drops to the point that the car stutters and almost stalls. When its colder out, it does stall. It starts right back up, but Im wondering if anyone elses car has done this? Also once in a while, the pump will turn off after a minute or so like normal, but than it will kick back on for a couple seconds and then off again.

It may not even be an air pump issue, but it seems like right when it kicks on is when the cars idle drops.