Okay, sorry I haven't gotten back to this in a timely fashion.
Good on the MAP hose! I often wonder if the oil is able to get up into the vac port and get inside and do some kind of "damage" to the internal workings of the MAP? If it was plugged solid, wonder why it didn't set a DTC?
On the TPS, I was thinking that it has to be built like a dimmer switch...so yea a rheostat was my visualization also....bad contacts & all.
I have an old snap-on MT2500 scanner I bought used from a retired mechanic. I got what I thought was a generous deal from the guy, $200. The rub is the software which is to me expensive. I have basic emissions/motor trouble-shooting software. I bought the anti-lock software cheap on e-bay, it was about $40.00 if I remember right. I kept loosing auctions on Tech1A's....seems everytime I found one to bid on with good software packages for our cars, I would reach my $1,000.00 limit and loose out to a more determined bidder. The Tech1A is the one to have IMHO, because I think the FSM's 6E section is written around that scanner. What I have is very useful, when I get a DTC it makes "seeing" what's going on a breeze.
Good job on your part, now go get some quality testing time with your baby!
Tom