RYCO FULE FILTERS.
Fuel ﬁlters will retain particles as small as ﬁve microns (about one tenth the diameter of
a human hair) and differ to normal lubrication ﬁlters as the type of ﬁlter media used in
this application is very speciﬁc. It must be able to trap and hold dirt and also separate
water from fuel without restricting the ﬂow of fuel to the engine.
Fuel ﬁlters for carburetor engines operate at low pressure and are usually housed in a
clear nylon body.
Conventional carburetored engines that are tuned for maximum fuel economy will
have very small carburetor jets. Tiny particles of dirt can easily block these jets, causing
annoying stalling or misﬁring.
The EFI fuel ﬁlter is one of the most vital components in the electronic fuel injection
(EFI) system. Fuel injection ﬁlters operate at high pressure and are always housed in
a metal canister.
Since the injectors are electronic solenoids and timed by the vehicle’s computer, the
precise amount of fuel is dependent on how long the injectors stay open (milliseconds).
The fuel injection reacts immediately if the fuel pressure is correct and the injectors
are not blocked by dirt or foreign matter.
The fuel ﬁlter should be unaffected by changes in pressure and resistant to damage
from shock and vibration. In order to fulﬁll these tasks, the external and internal
construction of the ﬁlter must be of the highest quality and all seals, both internal and
external must be ﬂawless.