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4.3 mpi ?

Mikey N.C.

Advanced Contributor
12 v, at all injectors with key on pink/ w, no volts with key off. Green has ground with key off and goes away , with key on. I've tested injectors with
Meds program 1&2 pass and click.3,4,5-6 , can't complete test. Swapped injector connectors from 2 to 4 and can fire #4. Found that I'm not getting ground pulse to injectors that are not firing ( clicking), don't have that wiring diagram was looking rite before quitting time today, will look more tomorrow. Does ecm have individual ground wires for each injectors ? Book says if ecm injector driver fails , you lose half or all injectors. But motor cranks right up and runs. Then it starts cutting out slightly , it's noticeable sound of exhaust but not at motor, no shaking . if 4 injectors are not right how can motor run?
 
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