Ok guys, i dont know what the hell is going on with my car but its bad.First off, i have a TMS chip, Dinan Intake, and UUC exhaust. My car randomly will lose power. I can be driving, then press the gas and all of a sudden the car goes nowhere and shakes when i press the gas. When i idle, randomly, the car will start violently revving a little and if i pres the gas metal scraping sound comes from under the car and it turns off. On the other hand sometimes if i tap the gas a few times when its bout to turn off it runs fine. Mechanic drove, it didnt happen, changed fuel pump, fuel relays, and spark coils, still today the car turned off and would not even turn back on. Left it alone for about 2 minutes, car turned back on. Opinions please, my mechanic says it can only be the air flow meter or maybe even my software considering i changed my block recently.
Any help would be much appreciated.