Check Fuel Pressure
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.
- IG "OFF" and disconnect Fuel Pump Relay in Junction Box.
- Start-up and wait until it stops itself.
- IG "OFF" and connect Fuel Pump Relay.
- 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: 480 ~ 500 kPa (4.9 ~ 5.1 kgf/cm2 , 69.6 ~ 72.5 psi)
- Is the measured fuel pressure within specifications?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair or replace according to the below table. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
CONDITIONS AND POSSIBLE CAUSES
| Condition | Possible Cause |
|---|---|
| Fuel Pressure is too low | Fuel filter, fuel pressure regulator, in-tank fuel hose or the fuel pump |
| Fuel Pressure is too high | Fuel pressure regulator, hose or pipe |