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Need help everyone. Just had my boosted grandsport motor forged built. Upgraded my hpfp to Lt4 style and the injectors. Low side fuel system, and Alkymethanol kit installed as well. The car was on the dyno and had one great run. Well the next run the pedal was floored, however the car didn't go vroooooooooom(lol) codes P129D and P12A6I've swapped throttle body and still the same result no coded for the TB. It as if the ecu is not tell the fuel to be pushed when the car is commanding it. The car drives ok normally but if I push the pedal to the floor nothing happens. Just imagine you're trying to merge and you push to do so but the vehicle doesn't pick up any speed nor sprint. All helped welcome. Thanks in advance.
Can’t tell you 100% for sure…I’ll test before condemning a part but below is the circuit testing and wiring…FPCM is PWM (Pulse Width Modulated) so as the ECM signals an increased PW the FP pressure will increase.
Engine code P129D and P12A6
