I have a 95 blazer with 230k on it. It’s been running fine until last week when it stalled out on the way to work. I live about 15 miles from work and it has made it 14 miles before the stall out. Did the same thing on the way home. Changed plugs last night since it was a little dirty and it ran fine in the driveway and around the neighborhood for over an hour but then died on the way in today as well. When it dies it will not immediately restart and will sometimes start but sound like a clunky diesel and not rev out at all. After a few minutes it will run and drive again. Any suggestions on what to look at?