12 13 ... Spark-Plug Faults

2013 Mini Cooper Countryman, Standard TransSECTION 12 13 ... Spark-Plug Faults
WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.

Evaluation of sparking period at idling speed.

  1. Normal ignition voltage peak Spark plug is OK.
  2. Low ignition voltage peak Small electrode gap.
  3. High ignition voltage peak Large electrode gap.

Fig 1: Evaluation Of Sparking Period During Idling Period
G00313213Courtesy of BMW OF NORTH AMERICA, INC.

Evaluation of sparking period at idling speed:

  1. Normal combustion period:
    • Spark plug is OK
    • Fig 2: Evaluation Of Sparking Period - Normal Combustion
      G00313214Courtesy of BMW OF NORTH AMERICA, INC.

Long combustion period:

  • Small electrode gap.
  • Fig 3: Evaluation Of Sparking Period - Long Combustion Period
    G00313215Courtesy of BMW OF NORTH AMERICA, INC.

Short sparking period:

  • Large electrode gap.
  • Fig 4: Evaluation Of Sparking Period - Short Sparking Period
    G00313216Courtesy of BMW OF NORTH AMERICA, INC.

RENDER: 1.0x

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