Check blocking of intake system
Visually/physically inspect the blocking in intake system for following items
▶ Throttle body gasket and damage
▶ Clogging of Air cleaner
▶ Blocking in intake manifold and injector caused by any foreign substance
Has a problem found?
YES
▶ Repair or replace it, and go to "Verification of Vehicle Repair" procedure.
NO
▶ Go to " Check fuel pressure" as follows.
Check fuel pressure
Be cautious that Fuel is explosive and an empty fuel tank can still contain explosive gases.When working on fuel system make sure to supply adequate ventilation to the work area. Do not smoke, and keep sparks and open flames away.
The fuel system remains under pressure when the engine is not running. Release fuel systempressure before disconnecting any fuel line to reduce the chance of presonal injury orfire damage to vehicle components.
Refer to "Fuel Pressure Test" in Fuel Delivery System.
Condition | Possible Cause | Suspected area |
Fuel pressure too low | Clogged fuel filter | Fuel filter |
Fuel leak on the fuel-pressure regulator that is assembled on fuel pump because of poor seating of the fuel-pressure regulator | Fuel pressure regulator | |
Fuel pressure too high | Sticking fuel pressure regulator | Fuel pressure regulator |
Fuel pressure drops slowly after engine is stopped | Injector leak | Injector |
Fuel pressure drops immediately after engine is stopped | The check valve within the fuel pump is open | Fuel pump |
Check fuel leakage in injector
IG "OFF" after checking the fuel pressure test.
Stop engine and check for a change in the fuel pressure gauge reading for 5 minutes.
Specification : After engine stops, fuel gauge reading is maintained for 5 minutes.
Is the fuel gauge reading within specification?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ There is a fuel leakage in injector. Repair or replace it, and go to " Verification of Vehicle Repair" procedure.
