My niece lives in Florida and it’s always hot. I’ll drive her car for an hour or more with AC on, no problems. Turn it off for 10-15 min and it won’t start. All the dash lights go on, it cranks, just won’t actually start. Wait a non consistent amount of time (between 2-20 min) and it will start. About 3 weeks ago the Power Train light went on and these symptoms started happening. A mechanic said it was the Engine Cooling Fan Assembly so he changed that. It didn’t happen for a few weeks. Now it’s happening again! Any ideas?

 

I had this happen years ago and it turned out to be the electric fuel pump vaper locked due to heat but that was a fuel pump that was not mounted in the fuel tank.

 

Need to do some basic testing. Fuel pressure when won't start. Will it hit with ether?