I have a 1970 C10 with a 5.3 from a 2003 Silverado installed. I had a friend program the computer to remove the general items like the VATS and rear O2 sensors to make it operate in my setting.
He noticed during some cycling that I was receiving some false knock and he suggested I swap the knock sensors because he had seen a corroded rear sensor cause knock in the past. I have now changed the knock sensors 3 times, all with new AC Delco units (2 sets from Amazon to start and recently a brand new set directly from my local GM dealer). I also replaced the short harness with a new GM unit the first time I replaced the sensors. I have checked all of the wiring from the sensors to the PCM, ensured that the knock sensors have the correct resistance and that they respond to tapping on the block, but I still keep receiving the P0327 and P0332 trouble codes for 'low voltage'.
Is there anything in the tune that could cause the PCM to think the voltage is too low? Possibly something I can point my friend to and have him check? I have a wireless OBD scanner and app on my phone, but with no PID's for knock I don't have a way to log the sensor output.
Is there anything else I can do besides having him remove the sensors from the tune to prevent the codes from occuring again?