17-86 SELF-DIAGNOSIS SYSTEM
Primary Fuel Injectors #1, #2, #3, #4 (Service Code 41, 42, 43, 44) (DTC P0201,
P0202, P0203, P0204)
Primary Fuel Injector Fuel Line Inspection
Fuel Tank (see Fuel Tank Removal in the Fuel System
Air Intake Chamber (see Air Intake Chamber Removal
in the Fuel System (DFI) chapter)
Primary and Secondary Fuel Hoses (see Fuel Hose Re-
placement in the Periodic Maintenance chapter)
Be sure to place a piece of cloth around the fuel outlet
pipe of the fuel pump and the delivery pipe of the throttle
Fuel is flammable and explosive under certain con-
ditions and can cause severe burns. Be prepared
for fuel spillage; any spilled fuel must be completely
wiped up immediately. When the fuel hose is dis-
connected, fuel spills out from the hose and the
pipe because of residual pressure. Cover the hose
connection with a piece of clean cloth to prevent
Check the fuel injector fuel line for leakage as follows.
Connect a commercially available vacuum/pressure
pump [A] to the nipple of the delivery pipe [B] with the
fuel hose [C] (both ends with the clamps [D]) as shown.
Rear View [E]
Connect the fuel hose [F] (both ends with the clamps [G])
between the delivery pipes [H] of the throttle body assy
and nozzle assy [I] as shown.
Apply soap and water solution to the areas [J] as shown.
Watching the pressure gauge, squeeze the pump lever,
and build up the pressure until the pressure reaches the
Fuel Injector Fuel Line Maximum Pressure
380 kPa (3.9 kgf/cm², 55 psi)
During pressure testing, do not exceed the maxi-
mum pressure for which the system is designed.
Watch the gauge for at least 6 seconds.
If the pressure holds steady, the fuel line is good.
If the pressure drops at once or if bubbles are found in the
area, the fuel line is leaking. Replace the delivery pipe
assy, injectors and related parts.
Repeat the leak test, and check the fuel line for no leak-
Install the removed parts (see appropriate chapters).
Start the engine and check for fuel leakage.