System Inspection

Check for fuel pressure
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 "Check for Exhaust system" below.
  NO
  - Check fuel delivery system.
  - Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for Exhaust system
1. Check exhaust system for leaks, cracks, loose connection (especially exhaust manifold, catalyst around rear HO2S, etc).
2. Is exhaust system okay?
  YES
  - Go to "Check for Intake system" below.
  NO
  - Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.