Art, do you recommend attempting to clean a dirty TPS contact area? I know many people recommend against it, but when I've had a flaky TPS out of a car that has been exposed to a lot of grungy throttle body build up, I've never been afraid to briefly soak it and shake it repeatedly in solvent or spray contact cleaner in an attempt to dissolve/dislodge some of the internal grunge around the contacts as long as I immediately shake it out and air dry it. Never had a problem doing this myself and never had to replace a worn TPS. For proper TB adjustment, Volvo has rather exact specs, which vary a bit by engine, for setting the throttle plate stop screw, adjusting the TPS with a thickness gauge at the throttle stop screw and then adjusting the linkage rod to the throttle spindle stop and finally the kick down cable free play. I had it all published in the 700/900 FAQ at one point, but it has seemingly since disappeared.
--
Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now