Fuel System Inspection

1. Check the fuel pressure
   1. Check the fuel for excessive water, alcohol, or other contaminants.
   2. Install a fuel pressure gage.
   3. Inspect fuel pressure with normal idle status.

      Specification:  338~348 kpa (3.38~3.48 bar)

   4. Is fuel pressure within the specified value?

   YES 

   • Go to next step as below.

   NO 

   • Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   Condition	Possible Cause	Suspected Area
   Fuel Pressure too low	Clogged fuel filter	Fuel filter
   	Fuel leak on the fuel-pressure regulator that is assembled on fuel pump	Fuel Pump (Fuel Pressure Regulator)
   Fuel Pressure too High	Sticking fuel pressure regulator	Fuel Pump (Fuel Pressure Regulator)

2. Check the fuel line pressure

1. Stop the engine.
2. Check that the fuel pressure change.

   Specification:  After engine stop, the fuel pressure is to be maintained at least 5 minutes

3. is it within the specification value?

YES 

• Check the engine compression pressure. After check the engine mechanical parts, repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

NO 

• Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.