Fuel System Inspection

Fuel System Inspection

Troubleshooting

1. Fuel pump inspection

Remove fuel filler cap and turn ignition switch to ON position.
Confirm that fuel pump operating sound is heard from fuel filler port for about 2 sec. and then it stops.

Is it in good condition?
YES -
Go to Step 2.
NO -
Check fuel pump circuit. Fuel Pump and Its Circuit Check

2. Fuel pressure check

Check fuel pressure. Fuel Pressure Check

Is it in good condition?
YES -
Go to Step 3.
NO -
Repair or replace defective part.

3. Power balance test

Check power balance. Power Balance Test

Is it in good condition?
YES -
Fuel system is in good condition.
NO -
Go to Step 4.

4. Fuel injector circuit check

Check fuel injector circuit. Fuel Injector Circuit Check

Is it in good condition?
YES -
Go to Step 5
NO -
Repair or replace defective part.

5. Fuel injector check

Check fuel injector. Fuel Injector Inspection

Is it in good condition?
YES -
Substitute a known-good ECM and recheck. ECM (Engine Control Module) Removal and Installation
NO -
Replace fuel injector.