I'm pretty sure the ecu grounds the injector I could be wrong. but from what I remember the ecu grounds the injector and will always have power to the injector...so there possibly a problem in the circuit not the ecu. are you checking with a node light? or a mulitmeter you can check restistance between the ecu connector and the stright injector if you do get resisitance it could be high if not it could be the injector