re: #228 FFL (GOP Delenda Est)
Probably not a great contribution but my Mazda 323 once “just quit”. Turned out to be a cracked crank shaft.
Edit: Though I think that’d be a detectable condition and not something that is repaired and then just dies again.
Just to clarify. The shop that did repairs on the A/C didn’t do anything to the engine. They tried looking for the cause, but couldn’t find it. And then it mysteriously worked for just a little while after the first time.