Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Do you have a test light or multi meter to test electrical at all?
Let me know,thanks Pete
At one of the injector connections see if you have power on one wire with key on at all times, at or near 12 volts DC.If you do see if you have a ground pulse ( off/on rapid signal) when cranking over the engine at the other injector wire.
Let me know when your ready.
O.k. so no ground pulse.
O.k. at the fuel pump relay test for these signals and let me know what you come up with here
Orange wire 12 volts at all times
Black/white wire ground at all times
Dark green/white wire ground with key on the first two seconds or when cranking
O.k.,at the engine computer test these wires for the signals shown
All black/white wires ground at all times
Pink/black wire 12 volts key on
Orange wires 12 volts key on
Yes it should be located behind the glove box on top of the heater box
O.k.,the PCM/ECM has failed causing this issue.You have the correct power and grounds to it but it is not energizing the fuel pump relay or sending ground pulse signals to the injectors.I have seen this occur before and the PCM/ECM has to be replaced.Make sure when it is replaced you remove the PROM chip from it ( remove the access panel on top of the PCM ) and place that chip in the new PCM/ECM.
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