'00 Runnin rough; P0340, Wet bank o' plugs

[Macgiobuin]

I have a 2000 Mercury Mountaineer 5.0 l V8 110k miles.
The car started running very rough, at all times and temperatures, but not if you stepped on the pedal and really floored it. Ck engine light was illuminated, my code reader said p0340 (camshaft position indicator). I checked it on an ohmmeter, seemed good, reacted to ferrous metal that passed in front of it; actually soldered the wires to the spade connectors; still got the problem. Replaced the sensor, still the same; continuity check of wires to PCM, good; rewired the signal wires to the PCM plug, still the same. Looked at the engine while it was running rough when it was very dark (not even a full moon)--no voltage leaks from the secondary ignition wires. Took out the plugs, and the 4 plugs on the passenger side were gas-wet, while the 4 on the drivers side were perfect. This has 2 coil packs of 4 plugs each, and each plug pack services 2 plugs on one bank and 2 plugs on the other. There is only one fuel pressure regulator on this engine. I suspect oxygen sensors on one side (?) maybe. Do you have any experience with this problem on this engine/setup? I did a compression while I was at it and I got between 162 and 171 on all 8 cyls. Help.