I got the nelson tune a while ago. Three weeks ago put on a new airaid cai, drove it awesome for two weeks, now when i go to romp on the gas my truck sputters, chug-a-lugs and slows down. It was at the mechanic all last week, he tested everything, everything checks out ok. Fuel injectors are clean, fuel filter and fuel pump are fine. He also put in a new mass air flow sensor and still no change.

From what i understood from him he thinks the pcm is limiting the amount of fuel entering the engine during heavy throttle. He was going to flash the pcm but since he knows it isn't stock i asked him not to.

Could the CAI and the PCM be doing something against eachother? I have no idea so i am open to all suggestions, thanks.