I pulled off the freeway and while in a parking lot it hesitated a bit when I hit the gas then started running ok again. Hoping it was a glitch I got back on the freeway. It did it again a few times but then happily cruised at 70 for another 30 miles. Then it suddenly started backfiring and losing power. I pulled over and it has not run for more than a few seconds and a time since. It will start up but die slowly when idling or die right away if I hit the gas.
Hoping it was my TPS which I knew was on the way out I put in the new one I already had, no change.
I had it towed to a mechanic and all they can tell me so far is they thought the timing had jumped but they checked that and it seems to be fine. When they do get it to start there's gray smoke coming out the tailpipe for the few seconds it runs. They fussed with it for hours but all they can tell me is they're sure they can figure it out. I'm not quite as confident.
No engine light, I'll call in the morning to see if it's giving any new codes. No fluid loss or obvious fluid co-mingling and normal engine temp.