System Inspection

■ Air Leakage Inspection

Visually/physically inspect the intake system for following items
- Vacuum hoses for splits, kinks and improper connections.
- Air leakage after throttle body.
Have any problems been found?
YES
- Repair or replace it which has a problem, and go to "Verification of Vehicle Repair " procedure.
NO
- Go to "Fuel Line Inspection" procedure below.

■ Fuel Line Inspection

Check the fuel line for following items
- Connector status.
- Damage/bent/pressed or twisted.
- Fuel leakage.
Have any problems been found?
YES
- Repair or replace it which has a problem, and go to "Verification of Vehicle Repair " procedure.
NO
- Go to "Fuel Line Pressure Inspection" procedure below.

■ Fuel Line Pressure Inspection

NOTE:

Gasoline or gasoline vapors are highly flammable/explosive and an empty fuel tank can still contain explosive vapors. A fire could occur if an ignition source is present. When working on fuel system make sure that the work area has adequate ventilation. Do not smoke, and keep sparks and open flames away.
The fuel system remains under pressure when the engine is not running. Release fuel system pressure before disconnecting any fuel line to reduce the chance of personal injury or fire damage to vehicle components.

Start-up the engine and remove the fuel pump fuse and wait until engine stops.
Install the fuel pressure gauge to the delivery pipe with the fuel pressure gauge adaptor.
Install the fuel pump fuse and start-up the engine.
Check that there is no fuel leakage from the pressure gauge or connection part.
Measure the fuel pressure at idle.
Specification : 480 ~ 520kPa (4.89 ~ 5.30kgf/cm² , 69.6 ~ 75.4psi)

Is the measured fuel pressure within specifications?

YES

Repair or replace according to the below table. And then, go to "Verification of Vehicle Repair " procedure.

Condition	Possible Cause
Fuel pressure is too low	Fuel filter, Fuel pump, Fuel pipe
Fuel pressure is too high	Fuel pump, Fuel pipe