Low pressure fuel line Inspection
NOTE:
- 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 system pressure before disconnecting any fuel line to reduce the chance of personal injury or fire damage to vehicle components.
- Ignition "OFF". Remove Fuel Pump Fuse (20A).
- Start engine and wait until it stalls.
- Ignition "OFF". Install Fuel Pump Fuse (20A).
- Install the fuel pressure gauge to the delivery pipe with the fuel pressure gauge adaptor.
- Activate the fuel pump, and with fuel pressure applied, check that there is no fuel leakage from the pressure gauge or connection part
- Measure the fuel pressure at idle.
Specification: Approx. 480 ~ 500 kPa (4.9 ~ 5.1 kgf/cm2 , 69 ~ 72psi)
- Is the measured fuel pressure within specifications?
Condition Possible Cause Fuel Pressure is too low Fuel filter clogged, Fuel leakage, Faulty Fuel Pressure Regulator Fuel Pressure is too high Fuel pressure regulator stuck, Faulty Fuel Pressure Regulator YES
- Go to "Wiring Inspection " procedure.
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.