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Home >> Hyundai >> 2017 >> Accent Value Edition >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 3) >> DTC P0300: Random/Multiple Cylinder Misfire Detected >> System Inspection >> Fuel Pressure Check

Fuel Pressure Check

  1. IG KEY "OFF".
  2. Disconnect a fuel pump relay.
  3. Engine start and wait until engine stop. and then key "OFF".
  4. Install fuel pump relay.
  5. Connect fuel pressure gauge using the correct adaptor.
  6. Start the engine, and record fuel pressure.

    Specification:  429 ~ 469 kPa (4.38 ~ 4.79 kgf/cm2 , 62.3 ~ 68.1 psi)

  7. Is the fuel pressure normal?

    YES 

    • Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary and go to Verification Of Vehicle Repair procedure below.

    NO 

    • Check clogging on the fuel filter.
    • Check the fuel supply and return line.
    • Repair as necessary and go to Verification Of Vehicle Repair procedure below.
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