[Mike V. Florida]

This must be such a frustrating problem. I would think there would only be a few things to check. I have not seen the problem in my car, knock on wood, even in South Florida with ethanol gas.

We know for a fact that vapor lock happens when the gas boils creating an air pocket that stops the gas flow.

Can we start a list of thinks that would cause the engine compartment to get hot enough to cause the problem?

I figure we could create a list and once done, those with the problem could pick the things that their car have via a poll and see if we see anything in common.

How about;

Engine pans - they are supposed to direct air flow across the engine.
Flush radiator regularly?
Plain water or antifreeze - what ratio?
Steel fuel lines, copper lines
Color of plugs - to indicate lean running
Additional fuel filter - I'm thinking fuel would flow at a rate greater than what is used so large amounts of fuel would enter the carb be used valve would open refill the bowl, as opposed to the valve always having to be open with fuel "dripping" in the bowl all the time.
How long driven before the problem appears?
Fuel Octane
Fuel Brand

Remember we list the things first for a day or two then create a poll with all the possibilities and have those wit with problem select all that apply. Hopefully we can find an item or two that stick out.