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System Inspection

Check For Leakage, Damage, Or Clogging/Contamination
1. Check for contamination, clogging, or improper installation of gasket.
  Any damage or improper installation of throttle body gasket.
  
  Any damage or improper installation of gasket between intake manifold and surge tank.
  
  clogging or contamination of intake manifold and injector by foreign materials.
  
  Contamination or sticking open between surge tank and PCSV by foreign materials.
  
  Any damage or contamination of HO2S (S2) by foreign materials.
2. Has a problem been found?
  YES
  
  Go to "Check Fuel Line " procedure.
  
  NO
  
  Repair or replace as necessary , and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check Fuel Line
1. Check for clog, contamination, and installation of Fuel Line as follows:
  Connection for each connectors in Fuel Line.
  
  Damage, interference, and installation of vacuum hose connected to Fuel Line.
  
  Bend, leakage and squeeze of pipe in Fuel Line.
  
  YES
  
  Go to "Check Fuel Pressure " procedure.
  
  NO
  
  Repair or replace as necessary , and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check Fuel Pressure
1. IG KEY "OFF".
2. Disconnect fuel pump relay from junction box in passenger compartment.
3. Start engine and await until engine is off and then, IG "OFF"
4. Connect fuel pump relay again.
5. Connect fuel pressure gauge on the fuel filter with fuel pressure gauge adaptor.
6. Start engine again and measure fuel pressure.
  Specification: Approx. 3.5kg/cm²
  
  Fig 1: Checking Fuel Pressure Using Fuel Pressure Gauge
  Courtesy of KIA MOTORS AMERICA, INC.
7. Is the fuel pressure normal?
  YES
  
  Go to "COMPONENT INSPECTION " procedure.
  
  NO
  
  Check any damage of fuel return hose or pipe.
  
  Check any sticking of the valve in the fuel pressure regulator.
  
  Repair or replace as necessary , and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.