Vapour Lock

[flaatr@yahoo.com (Euroroc II)]

Vapor lock occurs when the vapor pressure of the fuel is higher than the 
surrounding environment. In older vehicles, with "sucking" fuel pumps close 
to the engine, the pressure in the fuel line to the tank is reduced by the 
sucking action of the fuel pump drawing fuel form a fuel tank nearly ten 
feet away, and when heated, the gasoline may actually boil creating a vapor 
of gasoline which the fuel pump cannot handle, thus the name "vapor lock"; 
i.e. it occurs when the fuel pump, which is designed to pump liquid, loses 
suction as it tries to pump fuel vapour

At 04:19 PM 2/19/03 +0100, Ian Shaw wrote:
>Hi all
>
>can anyone explain vapour locking and what would cause it please
>
>Best Regards
>
>Ian Shaw
>(Research & Development)
>e-mail: ian.shaw@martin.dk
>
>Martin Manufacturing (UK) PLC
>
>Tel:  01507 604399
>Fax: 01507 601956
>
>Web: www.martin.dk
>
>
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