Vapor Lock 101 ?

[Benson]

Marc,

Is it possible that you are using gasoline from last winter or have recently filled up from a station with a low volume of gasoline sales? Maybe the station is still selling "winter gas" in the storage tank!

What I am getting at is if the gas you are using is "winter gas" ... it will boil at a much lower temperature and cause vapor lock or vapor bubbles in the system at a lower temperature.

On a 95 degree day recently I opened a 5 gallon GI can of "winter gas" and as soon as I relieved the pressure the gas started to boil and continued to boil in the GI can for 3 or 4 minutes.

Cars with fuel pumps have less vapor lock problems compared to gravity feed systems because of the pressure the pump creates prevents boiling at a given temperature Just like the gas in my GI can did not boil until I relieved the pressure when I opened the can.