What now? (bad idle and poor running)

There was a big improvement with the TPS and the old one was difficult to turn compared to the new. I feel certain that was the major issue. But, you're right- in order to be positive. Then I'd have a known good one on reserve.

Hey-you figure out how to fix my fuel gauge yet ?

No thats a tricky one, might have to go with dave on that one as long as its running good im happy.