i just put this motor in this car i got that sat for 3-4 years, i've got all my parts off my GTU (that ran before i pulled this stuff). the CAS, Coils, Sensors, tps, etc the only thing i haven't change is the ecu? it will run if i hold the gas down at a certain spot and tack at like 5000 rpm but if i let off or try to give it more throttle it either dies or jumps around for awhile. What should i check or do next?