Is the answer right under my nose?
Used car lot. Dead battery on arrival. Complaint is stalling, barely made it off the trailer on its own power. P0660 is the only fault i see at first. I try to crank multiple times with no start.Finally starts but stalls as soon as i touch accelerator. Check faults again and P0340 and P0339 show up. So I scope the signals. I used a long time base but could see sensors not pulling all the way up. So I called the sensors. Install, vehicle starts. I do cam/crank relearn, vehicle revs all is good. Nope, stalls out again. I check codes and same three are back. Odd so I scope again with shorter time base. I notice odd events happening. Green trace is crank, yellow is cam.
These next three waveforms are all the same crank cycle and during cranking.Control is green and 5v is yellow for manifold tuning valve. Clean on off signal 3-5 volts. I know thats odd but also there is a glitch in the next capture then the final capture shows lots of hash. Very weird as well. I load test ground and is good.
Ill be going back to this vehicle later this week but I didnt get anywhere with it. Also, once it was time to go I decided to scan faults again and the rest of these codes popped up. If anyone has anything to add it would be appreciated