Attention: the fuel system is under pressure. To avoid fuel spillage and risk of injury or fire, shut off power before disconnecting fuel lines.
Caution: Do not pinch or block the nylon fuel lines, which may cause fuel to leak, which could result in a fire or injury.
Elimination of residual fuel pressure
1. Remove the fuel filler cap.
2. Remove the EF10 fuel pump fuse located in the engine compartment fuse box.
3. Start the engine and allow the engine to stall.
4. Rotate the motor for 10 seconds.
Fuel system check
Eliminate residual pressure in the fuel system.
Connect a fuel pressure gauge. Check for proper fuel pressure (283-324 kPa).
Check the fuel pump by disconnecting the fuel pump connector.
Connect a test lamp between tracks 2 and 3 of the fuel pump connector. When the ignition is switched on, the control lamp should burn for 2 seconds.
Check fuel lines for leaks.
Inspect the fuel manifold and injectors for leaks.
Check for possible clogged fuel filter.
Check for kinks or blockages in the fuel lines.
Check for fuel in the fuel lines to the pump.
Inspect the fuel pressure regulator vacuum port for fuel.
Check the fuel for contamination.
Check fuel pump sensor and fuel coupler hoses for blockage.
Check if the fuel filter in the tank is clogged.
Check the fuel pump relay.
Check the operation of the injectors by connecting a test lamp between track 1 of the fuel injector connector and «weight», connect a test lamp between track 2 of the fuel injector connector and «+» battery terminal. Turn on the starter. The control lamp should flash. Repeat this test for all fuel injectors.
Measure the resistance of each fuel injector (11.6-12.4 ohms, as the temperature rises, the resistance will gradually increase).
Replace all injectors with resistance higher than specified.
Check for a possible short to ground on the wires connecting pin 2 of each injector connector to pins A9, A22, A8, A26 of the ECM connector.
Check for a possible short to ground on the wires connecting pin 2 of each injector connector to the ignition switch.