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Leslie Walters

Fuel flow regulator/vapour seperator.

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My Haynes runs the original Sierra fuel system, namely the mechanical fuel pump connected to what is called in the manual a fuel flow regulator/vapour separator. the system has a fuel return pipe to the tank, I am sure I read somewhere that back in the day this regulator was bypassed when a fault was suspected. I can't see any reason on a system like this to run a regulator or a fuel return and would prefer to remove it has the pipework is not very well run. Anybody got any input?

 

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If it's a standard carb and mechanical pump, you should be able to remove the vapour separator and it'll work OK. 

Not necessarily connected to the separator but on kits, the underbonnet heat after the engine is switched off can evaporate the fuel in the carb making starting after a few days tricky because the pump needs to refill the carb. If this happens, you might need to fit a low pressure electric pump. 

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Yes get rid, it should not make any difference.

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