How often do the fuel injectors need to be serviced?
Fuel injectors have very fine passages in the discharge nozzle and rely on the fuel filter to pass only clean fuel. However if the fuel contains liquid contaminates of similar viscosity to petrol then the filter will not hold this element back, in fact it is this situation that leads to the injector passage restriction by a varnish like substance. It is very important to ensure only clean fuel goes into the tank and that the tank is cleaned thoroughly in the event of a load of bad petrol or diesel.
