Engine shutoff while driving?, Yes, it had half a tank of gas. Options

[Ecterg42]

Hi fellas,

I had been driving my 75 2.0 FI on the highway for 4 hours on a hot day, with a couple of bio-breaks. After the last stop, while accelerating onto the highway, the engine shotdown. Stopped, checked usual suspects and after 10 minutes it started and I was on the road again. 15 minutes later I when through an interchange onto a different highway, and during acceleration it shut down again. Weather really hot now. This time it would not start again, cranked but was like it was out of gas. Fuel pressure was 30psi. Oil temp was 180 - 200 and the level was good. An oil cooler is mounted in frunk floor where A/C was.
Could the heat from the oil cooler have caused the fuel pump to vapor lock? What other sensors or devices could cause the engine to just shut off like that?

Car flat-bedded home,(AAA-yea). The next morning at home I gave it a try and it started right up and ran just fine.

Thanks,
Greg

I added a photo of the frunk showing position of oil cooler to fuel pump.

[GregAmy]

Vapor lock is almost a moot point on D-Jet. After all, the only place fuel is sitting and cooking is after the driver's side fuel rail...everywhere else it's circulating back to the tank to be re-cooled and eventually re-heated...

The issue with 914 D-Jet today is almost always electrical. Relays, relay boards, wiring harnesses, fuel pumps, sensors, etc.

Mine was bad fuel pump relay pins and/or bad pins at the relay plate terminals.

Or maybe some kinda electrical ju-ju, I dunno.