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Good video! Some early fuel injected cars were also prone to vapour lock. Bosch K / KE Jet is one example and some throttle body injection systems too. In those cases age plays a very big factor, that amplifies the primitive and early systems.
A lot of FWD cars originally didn’t have after run on fans to cool the air under the hood, Vehicles with a prop fan also didn’t have this. There were several companies had to re work production lines to add in kits to allow a heat sensor under the hood to close the circuit for the fan via a 2 way relay to help cool down ambient air temp.
I had a Bosch K-Jet car for a few years that if I parked it after a long drive, say to fill up gas it wouldn’t start for half an hour, unless I left the hood open. Untill I removed the injectors to test the theory out it baffled me. A quick trip to the wreckers to salvage a run on fan set up worked well most the time but ultimately the only real fix was new fuel lines between the fuel distributer and the injectors and then adding some heat insulation tubing more commonly used to shield wiring around turbos and exhaust parts. After that fix/upgrade I never had the issue again, and that was a hot summer of road trips.
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