Thanks for the info - I think the earlier Crankshaft sensors were mounted to the rear of the engine near the starter - later Camshaft sensors are on the front where the VP-44 provides a nasty blockage for getting to it.
My truck runs fine under all driving situations - but a stalled LP 6 months or so back caused an engine hiccup, and delivered a CES light and CPS error code - I would have more expected a P0216 from that, since that was the first and last CPS code I've ever seen.
NOW, I can generate a P0216 anytime I want, by reving the engine to 3000 RPM in neutral and holding it there for 10 seconds or so. I detect a mild random miss when I do this, along with fluctuation in the tachometer - and not sure whether the larger injectors, or other system sensor issues might cause the same thing.
Just regular driving and towing are fine, no funny engine behaviors or codes - and lots of power and good economy.
I suppose I'm living in denial as far as the VP-44 is concerned, but really want to make dern sure I'm treating the right problem and not a decoy...
That's why the question as to the effects of a weak or erratic CPS, as compared to an outright failure, and how/if it might relate to a P0216 code.
Defective CPS = $70 at NAPA
Rebuilt VP-44 = $1000+ at most any rebuilder...
