Just a thought Marty on our GC rough idle, staled,hard to start & died a couple times. Code read too high voltage to MAP sensor...but MAP is good. A buddy said it was a false read so just take positive lead off of battery for a minute to reboot & problem was solved.
yea, I've done that every time we've worked on it. Seems to help for about 5 mins then it starts up again.
We have managed to cure a dead miss we had with the injectors and coil rail, but it's still got the hard start and rough idle.
I was thinking the MAP maybe a cause, about the only thing I have replaced.
When you replaced the cam sensor, did you check the timing of it? Did you check the slop in that drive gear. The gear is prone to wear. I've seen the teeth totally gone. As for the electrical problems, start with the grounds. Take them off and clean them. Clean the battery posts good. Maybe even add a body ground and block ground. Anything that could short the 5v reference could cause a bus code. Do you have a scan tool or just a code reader?
no, I just pulled the cam sensor off and replaced it, did not pull drive up and out.
We've got new terminals on the battery and it's clean, but I told my son it could be even something as simple as a ground wire somewhere. It's got a engine to body strap on it, maybe I need to remove and clean real well.
We borrowed an actual scanner that we could clear codes and watch live reads as it was running. It was throwing so many different codes that last time we did it we weren't sure where to start. It was reading high on front O2 and really low on rear one so we replaced them both, didn't help much.
I had thought of low fuel pressure too, was going to change filter, but it's only a sock inside the tank