2008 5.3LH6 Envoy E67 T42 DOD deleted
im totally stumped on this and could use any help available.
What would cause only one injector to shut off after starting ? #7 injector has good power, opened the harness up and replaced the control wire with same result. unplug #7 injector and get no open circuit DTC but any other injector will set a inj circuit code. Unplug the coil harness and crank it over and #7 injector pulses cranking only. gone through the harness with a fine tooth comb and cant find anything. Replaced the ECM and TCM with same results.
Have not programmed the ECU for DOD deletion yet as IM unsure if the ECM is any good or not. Should still idle on all cylinders if DOD is deleted right ?