Well hes my problem i just got done building the car did all the wiring #1 problem is the car starts up idles and runs fine but when you get into it to drive you take off its a 5 speed and as your accelerating it pops and when you let off the gas it clears up and get back in it it clears up all i have done to the car is replace the TPS and i adjusted it to .45 and now that i replaced the TPS it runs like that. Also when i swaped i took fuel pump ecu everything so i no its not that.