Need to better understand definition of terms here. Vapor lock is a commonly discussed issue in the automotive world. Is it possible to have “fuel expansion” that does not rise to the level of “vapor lock?”
Whatever you want to call it, there are conditions which cause some vehicles to have fuel-related hot start issues.
For instance, my 1951 with a 1962 235 typically starts on the first couple of revolutions once warmed up. It’s a very satisfying thing.
But once in a great while, on a very hot day after a short shut down (like a fuel stop), it will turn over and turn over and act like it doesn’t want to start. I have figured out that holding the pedal to the floor corrects this immediately. My theory is that the heat soak from air not moving and coolant not flowing, is causing some sort of fuel expansion that challenges the needle and causing a flooded condition. And that holding the throttle open is clearing that flood.
Is that a viable explanation and if so, what do you call such a condition other than vapor lock?
Last edited by JW51; 07/18/2023 6:41 PM.
