Flaps;

On the earlier TPSs, the plastic cap just snapped on, and just as easily snaps off to reveal the innards...and IF you have on of those, go ahead and remove it from the throttle housing (make witness marks to help getting it back in the same place on reassembly), then carefully pop the top off, blast clean with spray solvent, and inspect:

1. PC board foils (especially the area where the slider sits almost forever at cruise throttle openings) if edges of conductors show excessive wear at the edeges, that's the classic cause of hiccups at cruise. If worn away, there's not much to repair for even the most ambitious Brickboarder...replacement is about the only option...that's why I've considered making an optical (ZERO contact) replacement for those damned switches... (cost?...but it's got to be better than those damned things... who's interested? If it doesn't look too bad, lubricate liberally with Deoxid D5 *, pop cap back on and reassemble, using witness marks as a guide (lubing the shaft couldn't hurt).

* see also: http://www.intelab.com/swem/gastight.htm

2. Mechanical switch contacts of idle sensing switch.

I have no experience with late, replacement TPSs, which I understand it is not possible to open (maintenance free?...BS!...more like unmaintainable!...just like the car batteries)...somebody needs to be be slapped for that!).

Cheers