Well, here's another potential clue; After reading in the Riviera forum that it could be dirty, as you mentioned, I followed their advice & went and bought a can of CRC "electronics components cleaner" and sprayed the heck out of the thing several times. I sprayed the contacts at both ends of the connection, too. When I put it back together and cleared the code with the ScanGauge, it stayed off for awhile - like at least a half hour of driving while doing errands. But then it came back on and when I checked, it was the same code (P0102), and would come back on almost immediately when cleared again.
When I was working on it, I disconnected the flexible (rubber?) air intake hose, and saw a screen of some sort at the opening of the throttle body. This screen appeared to have a dent, and maybe even a little tear in it right in front of the MAF position (at the top). It also looked discolored - kinda "brownish", almost like it had been burnt. So I douched the heck out of it with the CRC cleaner too, but it didn't really get rid of the color, so I'm guessing it wasn't really "dirt". But I now remember while messing with it, wondering if that was somehow causing trouble, too. ??? What's the purpose of that screen? Just to keep larger particles out, or something else? If some sort of "charge" (electrostatic, maybe?) is supposed to go across it, could a break in it mess anything up?
