My 08 impala has a 3.5 with a cold air intake, performance plugs,wires, and the resonator deleted. About a week a ago the code for my tps started popping I would clear it and at first it was once a day now 4 to 5 times a day. I can start go and no problem then suddenly it will rev up like I pushed the gas then act like I took my foot off the pedal. It will do this 2 to 3 times in a row then suddenly the code for the tps pops up I can clear it and it will sometimes come right back other times stay off the rest of the day. Any suggestions on what this is? I had been told the mass airflow sensor I've been told the tps and I've been told the pedal itself.