car has a skunk 2 66mm throttle body and a y8 intake manifold with a chipped p06 ECU from HAMOTORSPORTS. I have contacted them about this problem and they say there’s not much they can do without knowing the AFRs. I’m at a loss. The TPS is calibrated you .5 V at closed throttle and 4.62v at WOT (can’t seem to get it to read 4.5v). The car will even backfire out of the intake at partial throttle. The problem only seems to occur after the car starts to warm up. It will not break up upon load when the car is cold. It also seems to start to reek of unburnt fuel at times. Any suggestions would be very much appreciated !