Installed the temp sensor today and it really didn't change anything. what ever it is i know will be simple when I find it. Tonight it wouldn't start again so I just kepp trying and after 4 or 5 minutes it finally fired up. I drove it down the freeway today and it seem to run comfortably about 60 to 65 mph. felt like more that that was pushing it. then i heard a bang in the rear and slowed down to 35 and drove it home. All seems OK but that sure scared me. thought i blew thr rear end but when I got home I tried 2wd and it drove fine so we'll see what happens next.