Spark plug diagnosis |
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Normal | Soot formation | |
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Lead settlement on spark plug | Oil settlement on spark plug | |
Possible cause:
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Possible cause:
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Ash settlement on spark plug | Worn middle electrode | |
Possible cause:
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![]() Possible cause:
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Electrode melt down | Melted middle electrode | |
Possible cause:
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Possible cause:
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The
photographs have been kindly made available by Robert Bosch GmbH |