Volkswagen Fuel System




Volkswagen Fuel System



The stock VW fuel system is pretty basic.  You have a fuel tank, hose, filter and mechanical pump.



There isn't much hose on a VW, but it does get old and does eventually fail over time.  A failed fuel line can lead to a flame filled engine compartment and lead to a complete loss of your vehicle.


Braided fuel hose should be used where rubber fuel lines are.




A working filter will help keep the rust and gunk in the fuel tank out of the carbs.  These are commonly seen under the carb and suspended by the fuel hose.  This is a potential problem as the weight of a filter filled with fuel and work itself loose from a fuel hose.  This will in turn spray fuel all over the hot engine and running distributor.  And as you can imagine, this can lead to a quick fire and destruction of the entire vehicle.


A filter should be placed by the transmission where it is less likely to cause a catastrophic problem should it fail.



Fuel Pressure

Fuel pressure from even a stock fuel pump and vary greatly and an over aggressive pump can easily overpower and flood a carburetor.


Solex and Kadron Carburetors should have between 1.5 and 2 PSI pf fuel pressure, while Dellorto and Weber Carburetors should have between 3 and 3 .5 PSI for fuel pressure.


If your pressure is too high, you can stack extra gaskets on the stock fuel pump or use a fuel pressure regulator for electric pumps.



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