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4. FUEL SYSTEM
4-1
4. FUEL SYSTEM
FUEL PRESSURE TEST ······························ 4-2
FUEL FILTER ··········································· 4-2
FUEL PUMP ············································· 4-3
FUEL TANK ············································· 4-3
The fuel system of a fuel injection system holds much more a pressure than on carbureted vehicle. Prior to
disconnecting a hose or to removing a component from the fuel system, follow the recommendation described
here.
Fuel lines remain under pressure at all times. Always proceed with care and use appropriate safety equipment
when working on pressurized fuel system. Wear safety glasses. Proceed with care when removing/installing
pressure test equipment or disconnecting fuel line connections. Cover the fuel line connection with an absorbent
shop rag. Slowly disconnect the fuel hose to minimize spilling. Wipe off any fuel spillage in the engine
compartment. Do not allow fuel to spill on hot engine parts and/or electrical connectors. Never use a hose pincher
on injection system high pressure hoses. Replace any damage or deteriorated fuel lines.
When the repair is completed, ensure that all hoses are connected and secured.
Always perform the fuel pressure test if any component has been removed. A pressure test must be done before
turning the ignition key to ON and setting the engine stop switch to RUN. The fuel pump is activated each time in
these conditions.
To locate a leak, pressurize the system. Check for leaking fuel or fuel odor. Spray soapy water on all hose
connections and injectors. Air bubbles will show the leaking area.
Inspect the fuel lines, fuel tank, fuel tank cap for damage, clogging and leakage of fuel. If any damages are found,
replace the defective parts with the new ones.