vapour lock

noun

1. a stoppage in a pipe carrying a liquid caused by a bubble of gas, esp such a stoppage caused by vaporization of the petrol in the pipe feeding the carburettor of an internal-combustion engine

Example Sentences

This may not have been a problem in cold and rainy England but during the scorching Indian summers, the fuel in the pump would evaporate causing a "vapour lock".

From BBC