Pontiac

Hi, i bought a g5 gt from pontiac like almost a year ago and after i install an aem cold air intake some problems happened. first when i turn it on for first time of the day and i shift first (doesnt matter the gear) and going at a speed of 15 miles and accelerate like to quarter or halve the pedal, the car deccelerates instead of accelerating. if i drive the car 15 min. before stepping at the gas to quarter this problem doesnt happen. when i am driving and i clutch it the revolutions go lower than normal, they go like to 500rpm and then they go to to normal 850. this problem gets fixed too after some 15 min driving but when i turn on the a/c both problems show again until i drive like 20 min. somebody tell me whats happening with my car and how to fix it. should a sportschip fix this? or an ecu upgrade? because some people tell me that its because some sensor doesnt detect that i have a cold air intake and its making a wrong air/fuel mix. is this true? thanks.

The best thing to do is re-install the stock intake and see if the car runs correctly. there may be a mass air sensor or some other type of sensor that has been dissconected when the new intake was installed.