P1682 LS2 t56 E40 bad PCM?
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P1682 LS2 t56 E40 bad PCM? Throwing P1682 along with P1516. LS2/T56 from GTO with matching pedal, TB, etc. harness reworked and PCM tuned by wait4me years ago (it's been a long project). Trying to get the car on the road and struggling to figure out what's causing P1682.
Seeing a voltage difference of about -0.03 volts on the IGN1 to the PCM when compared to the constant power orange wire to the PCM.
I feel like this shouldn't be enough of a difference to throw a code unless there's a higher difference at the PCM? I'm also measuring about 2.7 ohms on IGN1 when referencing ground, not sure if that means anything or if that's normal.
Engine will run and always throw P1682. P1516 will hit every time. I can clear it with my simple scanner but it will come back the next time I turn the ign on.
Days of searching haven't turned up much. I'm hoping it is something simple and not a bad PCM.
Any help would be greatly appreciated!
Seeing a voltage difference of about -0.03 volts on the IGN1 to the PCM when compared to the constant power orange wire to the PCM.
I feel like this shouldn't be enough of a difference to throw a code unless there's a higher difference at the PCM? I'm also measuring about 2.7 ohms on IGN1 when referencing ground, not sure if that means anything or if that's normal.
Engine will run and always throw P1682. P1516 will hit every time. I can clear it with my simple scanner but it will come back the next time I turn the ign on.
Days of searching haven't turned up much. I'm hoping it is something simple and not a bad PCM.
Any help would be greatly appreciated!
