I had a problem with my vehicle about 1 year ago where the vehicle had a hard time shifting and would idel high. A new thermastate fixed the problem and the problem went away for more then a year. Now about two weeks ago the problem arrised again, so I changed the therastate. But the problem remains.
THe vehicle will idel at about 1300 at start, slowly lowering to about 1,000 as it gets warmer. it used to idel at about 800.
The vehicle will shift high, sometimes not entering overdrive at all until many miles have been driven.
It seems like all the same symtoms as before, but now i can nnot get it fixed. Anyone have an idea on what could be causing the problem other then the thermastate?