System Inspection

1. Visually check for leak from exhaust system (especially between TWC converter and front exhaust pipe).
2. Are any leaks present?

   YES 

   • Go to "Compression test" below.

   NO 

   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check intake system for leaks, cracks, loose connection as following items:

1. Throttle body gasket.
2. Gasket between intake manifold and surge tank.
3. Seals between intake manifold and fuel injectors.
4. Seals between surge tank and PCV valves.
5. Are any vacuum leaks present?

   YES 

   • Go to "Check for fuel pressure" below.

   NO 

   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

1. Reduce the internal pressure of the fuel pipe and hoses and cover the hose connection with a shop towel to prevent splashing of fuel.
2. Remove the bolt connecting the fuel line to the fuel delivery pipe.
3. Using the fuel pressure gauge adaptor, install the fuel pressure gauge to the fuel pressure gauge adaptor.
4. Apply battery voltage to the terminal for the pump drive and activate the fuel pump: then, with fuel pressure applied, check fuel leakage from the pressure gauge or connection part.
5. Start an engine and warm up to operating temperature.
6. Check for fuel pressure at idle.

   Specification: Fuel pressure at idle: 51 psi (350kPa, 3.5Kg/cm² )

   Fig 1: Checking Fuel Pressure At Idle

   Courtesy of HYUNDAI MOTOR CO.
7. Is fuel pressure within specification?

   YES 

   • Go to "COMPONENT INSPECTION " procedure.

   NO 

   • Check fuel delivery system.
   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.