So I've been thinking for a while now about this whole cam synchro thing. It has me kinda scared being that I've got 87k on my 3.0.
I had an issue a little bit back with the oil gauge...since replacing the oil pressure switch, it has not returned, although that was THE hottest day of the year and I was stuck in stop and go traffic -- which I tried to replicate, and could not get the condition to reappear.
Anyway...looking through all the photos of the how to guides, I don't see how in the world the cam synchro (I realize it drives the oil pump) -- could cause the oil pressure to drop randomly and only at idle. I mean it's either spinning or it's not. There is the possibility that it could be jumping teeth, but then you'd have a check engine light for the cam sensor signal being off right?
I just don't see how the "oil gauge flickering" issue could be related to the cam synchro at all. Unless of course you assume that the synchro is partially falling apart and clogging the oil pickup with metal parts...but that would seem to be an issue at start up and when it's warm, not just a random condition that won't duplicate itself.