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Home >> Hyundai >> 2012 >> Elantra Touring GLS, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> Inspection Chart For Diagnostic Trouble Codes (DTC) >> P0300: Random/Multiple Cylinder Misfire Detected >> Ignition System Inspection

Ignition System Inspection

  1. Spark Plug Cable & Ignition Coil Inspection
    1. Visually/physically inspect the spark plug cable and ignition coil related to the misfiring cylinder(s) for the following conditions.
      • Damage, cracks, carbon and flashover
      • Poor connection or damaged harness
      • Connected to the incorrect cylinders at the ignition coil and spark plug
    2. Measure the resistance of the spark plug cable related to the misfiring cylinder(s)

      Specification:  5.6 kΩ/m ± 20%

    3. Measure the resistance of the primary and secondary ignition coil related to the misfiring cylinder(s)

      Specification  : Primary Ignition Coil Resistance :

      Approx. 0.5 ~ 0.6 Ω at 20 °C (68 °F)

      Secondary Ignition Coil Resistance :

      Approx. 7.5 ~ 10.2 kΩ at 20 °C (68 °F)

    4. Was a problem found in any of the above areas?

      YES 

      NO 

      • Go to next step as below.
  2. Spark Plug Inspection
    1. Visually/physically inspect the spark plug related to the misfiring cylinder(s) for the following conditions
      • Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks
      • Check for electrode gap : 1.0 - 1.1 mm (0.039 - 0.043 in.)
      • Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
    2. Was a problem found in any of the above areas?

      YES 

      NO 

      • Go to next step as below.