Thanks fellas, I took to removing the TPS to clean it and discovered the top torx screw was shawn in two and the bottom one was loose. On removal and inspection it was clean, I gave it a clean anyway and the underside of the throttle arm too; I have re-attached it with just the lower screw as I've been unable to find a replacement! I've tried Jeep
-- they want $120 for a new TPS -- Ace hardware, Kragen and Napa with no joy... other than going to a wreckers ANY thoughts? It seems to be neither a 4 or 5 metric but somewhere in-between.
Then I discoverd the MAP sensor vacum tube was broken in half! I guess it was brittle and snapped when I was checking the tightness of the manifold, so I replaced that and she seems to be running okay... not perfect but I also discovered the drivebelt needs replacing as does the water pump drivebelt wheel because it has a major crack in it... oh brother! Looks like a real BUST weekend.