Replacing my intake manifold on a 00 502 mpi. I seem to have mixed up the wiring on two of the cylinders on the fuel injectors. Does the ecm fire the injectors sequentialy or do they all fire at once? It looks like there are two different wiring colors, blue and red on half of the injectors and green and red on the remaining injectors. Anyone have access to a wiring diagram that could help me out?