2.
Has a problem found in this procedure?
 | ▶ Repair or replace as necessary. Go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to " Check fuel pressure" as follows. |
Visually and physically inspect the intake system for conditions listed below:
▶ Condition of the throttle body and gaskets
▶ Restrictions of the intake system
▶ Improper injection flow or leakage
Has a problem found in this procedure?
| ▶ Repair or replace as necessary. Go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to " Check fuel pressure" as follows. |
1. Be cautious fuel is explosive and an empty fuel tank can still contain explosive gases. When working on fuel systems make sure to supply adequate ventilation to the work area. Do not smoke, and keep sparks and open flames away.
2. 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". Disconnect Fuel Pump Relay in Junction Box.
Start engine and wait until it stalls.
IG "OFF". Connect Fuel Pump Relay.
Install the fuel pressure gauge to the delivery pipe with the fuel pressure gauge adaptor. (Refer to Shop Manual)
Activate the fuel pump, check that there are no fuel leaks from the pressure gauge or fuel system.
Measure the fuel pressure at idle.
Specification : 323 ~ 363 kPa (3.29 ~ 3.55 kgf/㎠, 46.8 ~ 52.6 psi)
Is the measured fuel pressure within specifications ?
| ▶ Go to "Check fuel leakage in injector" as follow. |
| ▶ Repair or replace according to the table below. Go to " Verification of Vehicle Repair" procedure. |
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 |
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 maintained ?
| ▶ Clear DTC and Test-drive under enable conditions. After the road test, If P0172 DTC is set, go to "System Inspection" procedure. If not, troubleshooting is completed. |
| ▶ Replace injector. Go to " Verification of Vehicle Repair" procedure. |
