There shouldn't be any voltage at the injector, with the key off. That circuit goes hot when you turn on the key, the computer controls the injector ground. Did you crank the engine, while checking for a pulse? If using a dmm, it may average what it sees, it won't show zero.
Either the computer doesn't see an rpm signal, something wrong with the wiring circuit, last but not least the computer.
To add, there is a purple wire with white tracer, carries the rpm signal to the computer, should be voltage on that wire.
Monday, June 15th, 2009 AT 8:47 AM