have you.. 
Continuous Injector 3 Firing
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Teching In
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Continuous Injector 3 Firing I don't know where to put this thread because its half fuel and half wiring. I swapped in a 5.3 into a 95 z28, with a "swapped" harness from BP Automotive. Anyways the computer is telling the #3 injector to fire. First I changed some ground and power wires and got all my injectors to read 12 volts on the hot side. Then I ran a new ground from the injector #3 to the PCM, no fix. Swapped computers still no fix. The car runs, but gas gets into the oil if that injector is left plugged in. Any help or ideas would be appreciated.
"First I changed some ground and power wires and got all my injectors to read 12 volts on the hot side."
What wires did you change? Is this a new or a modded harness?
In what order did you change things? IE: pcm, ground wire to #3, etc.
Ohm test the inj.
Injs fresh, or have they been sitting in the new engine?
What wires did you change? Is this a new or a modded harness?
In what order did you change things? IE: pcm, ground wire to #3, etc.
Ohm test the inj.
Injs fresh, or have they been sitting in the new engine?
Thread Starter
Teching In
Joined: Apr 2013
Posts: 35
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"First I changed some ground and power wires and got all my injectors to read 12 volts on the hot side."
What wires did you change? Is this a new or a modded harness?
In what order did you change things? IE: pcm, ground wire to #3, etc.
Ohm test the inj.
Injs fresh, or have they been sitting in the new engine?
What wires did you change? Is this a new or a modded harness?
In what order did you change things? IE: pcm, ground wire to #3, etc.
Ohm test the inj.
Injs fresh, or have they been sitting in the new engine?
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From: So.Cal.
If you swapped injector at #3 with another, and #3 still sprays continuously, then either wire harness may have a short to ground (including connectors at ends), or PCM may have internal short to ground.
You will need to test the harness for a short.
You will need to test the harness for a short.
unplug #3 injector connector, unplug PCM connector, check continuity between injector connector ground signal terminal and circuit ground (frame, battery etc..) If you get continuity then there is a ground short in the harness. If you get an open circuit, then it's the PCM.
Thread Starter
Teching In
Joined: Apr 2013
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unplug #3 injector connector, unplug PCM connector, check continuity between injector connector ground signal terminal and circuit ground (frame, battery etc..) If you get continuity then there is a ground short in the harness. If you get an open circuit, then it's the PCM.
