I have recently purchased a 2004 crossfire coupe...love the car,but I recently had the check engine light come on, car seems to run perfectly. I took it to the local dealer who said it was the air injection pump,which as I understand is some what of a commom problem, the scarey part is a new pump installed is almost $900.00 So I found a used one for under $200.00 and put it on myself....no change My question is has anyone had further experience with this? What component should I try next? I wonder what the likely hood is this pump would be bad as well? no way to test the pump that I know of. Any help I would really appreciate. I really love the car, just not sure where to go from here.