This is the situation. I start the car with the heater/ac in the off position and its starts good and idles fine. No codes. Now if I turn them on and leave the heater/ac in one of the on positions then try to start the car, the car takes awhile to find its idle. RPM goes from 300 to 1100 and as soon as the SES light comes on it idles fine at like 1000. Ive gone to auto zone to get the codes
1. P0300
2. P0480
3. P0481
4. P1133
5. P0108

My car has been tuned by Jeff at Carolina Auto Masters and has a 234 230 579 112 cam. What could be causing this?

 

What happens if you turn the AC on while the car already running? My hotcam runs exactly the same (smooth) at 900rpms with the AC on or off after tuning. The problem was excess fuel, and incorrect base running airflow.

 

If I turn on the AC while the car is on, the idle will go down to 500rpm for like 3 seconds then to normal. I adjusted the idle screw and relearned the Idle. So far its fixed but I really think its a tuning issue.

 

Yep. You need to correct the items I mentioned above in your tune.