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Clean spark plugs and check electrode gap, renew if necessary

Clean the spark plugs thoroughly. Remove all of the carbon deposit between the porcelain insulation of the center electrode and the spark plug housing.

Check the electrode gap which has to be between 0.6-0.7 mm.

Be careful that you only mount new plugs which are the same type that FIAT dictates to avoid a malfunction of the engine due to another degree of heat of the spark plug.

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Spark plugs - Fiat 500 vintage car