What has trusted mechanic done to troubleshoot this?
Have you verified fuel pressure when the car won’t start?
How long have you had this car? Is this a recent purchase? or had it for a while and this issue just started?
These vehicles had a history of exploding upon rear end collision, any chance anyone has modified the tank in any way to prevent this?
I must admit @lion9car makes a very reasonable and rational mention of what a non venting gas cap could induce symptomatically.
Has anyone done any fuel pressure tests ? Anyone verified the actual fuel level in the tank regardless of indicated on the dash?
I would do the simple test of the removing the gas cap as a very quick test to see if its a tank venting problem…very easy and will then steer diagnostics onto the next most logical suspect… and in my mind that would be the fuel pump (pump motor getting tired), fuel sending unit (fuel level) and or fuel pump pickup tube…or something along those lines.
Since this issue is repeatable…it should be rather easy to diag and repair.