System Inspection

■ Check air leakage 

1. Visually/physically inspect the air leakage in intake/exhaust system for following items
   • Vacuum hoses for splits, kinks and improper connections.
   • Throttle body gasket
   • Gasket between intake manifold and cylinder head
   • Seals between intake manifold and fuel injectors
   • Exhaust system between HO2S and three way catalyst for air leakage
2. Has a problem found in this procedure?

   YES 

   • Repair as necessary and go to "Verification of vehicle Repair " procedure.

   NO 

   • Go to "Check the fuel line" as follows.

■ Check the fuel line 

1. Check the fuel line for following items
   • Connector connection state
   • Damage/connection state for vacuum hoses connected to fuel line
   • Bent/pressed/twisted fuel line or fuel leakage
2. Has a problem found in this procedure?

   YES 

   • Repair or replace it which has a problem, and go to "Verification of Vehicle Repair " procedure.

   NO 

   • Go to "Check Fuel Pressure" as follows.

■ Check fuel pressure 

1. Connect GDS to DLC (Data Link Cable).
2. Warm up the engine to normal operating temperature.
3. Monitor "Low Pressure Fuel Pressure" parameter on the "Current Data" with GDS.

   Specification:  350~600 kpa

4. Is the fuel pressure normal?

   YES 

   • Go to "Component Inspection " procedure.

   NO 

   • Repair Open or Short to ground in power circuit, and 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