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Home >> Kia >> 2004 >> Amanti >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC: P0174 System Too Lean (Bank 2) >> Inspection/Repair >> System Inspection >> Check Fuel Line Pressure

Check Fuel Line Pressure

  1. Start the engine with the fuel pump disconnected to reduce the internal pressure of the fuel lines and hoses, and wait until the engine stalls before continuing.
    CAUTION: Be sure to reduce the fuel pressure before disconnecting the fuel main pipe and hose, otherwise fuel may spray out, possibly resulting in fire or injury.
  2. Disconnect the battery negative (-) terminal and then connect the fuel pump harness connector.
  3. Install the fuel pressure gauge using the appropriate adapter.
  4. Connect the battery's negative (-) terminal.
  5. Check that there is no fuel leak from the pressure gauge or connections.
  6. Disconnect the vacuum hose from the pressure regulator and plug the hose end. Measure the fuel pressure at idle.
    1. Specification: 320 ~ 350 kPa (3.26~ 3.57 kg/cm2 , 46.4~50.7 psi)
  7. Measure the fuel pressure when the vacuum hose is connected to the pressure regulator (while engine is running).
    1. Specification: 250 ~ 280 kPa (2.55 ~ 2.86 kg/cm2 , 36.3~40.6 psi)
  8. Is fuel pressure within specifications?

    YES

    1. Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO

    1. If fuel pressure is below specifications, check for a malfunctioning fuel pump or pressure regulator. Check for a restricted fuel filter.
    2. If fuel pressure is above specifications, check for a malfunctioning fuel pump or pressure regulator.
    3. Go to "VERIFICATION OF VEHICLE REPAIR " procedure
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