I got the new cam position sensor installed and the manifold and everything back in place with some new parts for the PCV tube. Car ran fine after blowing some big smoke for a bit after starting it up, but it soon cleared out. No fault codes. Drove it a bit and had some issues like it was in limp mode but a restart cleared that out, and I found a loose battery connector so I think it was losing electrons too. Drove it around last week and it seemed fine. Drove it again and it was doing fine on a little trip to the grocery store, then on the way back it was down on power although it was running OK.
A scan shows faults again for the right cam position sensor AND now for both upstream lambda sensors on that side too (0V showing on the scan for those two sensors, zylinders 1-3 and 4-6), so I am thinking the right bank is not running at all, the ECU has shut off fuel and sparks. I vaguely recall the guy I bought the car from saying he had replaced an O2 sensor, and I just replaced the cam sensor, so not clear what is going on. I tried to trace the wires and it looks like both O2 sensors run to the right side behind the engine under the throttle body then up into the wiring loom on back left side thence to the ECU, and the cam sensor goes into the loom right near the connector to it. Nothing apparent as to any breaks in the wiring, all looked good. I'm quite sure all those sensors would not fail at the same time so not sure what is going on. Very perplexing. I did not disconnect the wiring connector to the ECU, maybe I should do that and spray everything down with contact cleaner, see if that does any good. Maybe whatever connectors for those 3 things are goobered up.
Oh, and it looks like indeed the oil cooler is leaking off the back of the engine and dripping oil onto the exhaust downpipe on the right side, so there's that too... 😬🤑👎🏦