Backstory - I have a LM7 5.3 gen3 swapped into a BMW. Car would start and idle for me enough to drive in and out of my garage. I sold my house and had to bring the car to my parents house, this was beginning of January. I drove the car onto the trailer, and backed it off the trailer, no issues. I tried to move it a couple weeks later and I couldn't get it to start up. I started diagnosing now the weather is warmer and am stuck.
The issue I'm having is a crank no start, I didn't have injector pulse which pointed me to rpm signal and discovered I'm not getting an rpm reading.
What ive done so far:
checked for rpm reading with vcm as well as a tech 2 scanner - not registering an rpm on either
ohm tested wiring from ecm to crank sensor - good
replaced crank sensor - no change
verified all grounds to the ecm are connected and good
all 12v constant to ecm is present at all times
all switched 12v to ecm is present in run and also while cranking
have dtcs for throttle position sensor, egr (not connected)
Questions: does this setup get its rpm signal from the crank sensor or does it rely on the cam sensor? or does it need both signals?
Battery voltage stays around 12.4-12.6v with key on but has been dropping to 10.6v during cranking, is that too low and causing issues with the sensors reading?
i did set VATS to none and performed a write entire. Attached is the current file and recent log when i was cranking it over the other day.
ls swap stock file security and 02 dlete.hpt22-03-20 12-43-00.hpl