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International Automotive Technicians Network
Re: What causes this plug condition ?
Posted to Technical Discussion Forum on 4/21/2004 5 Replies

[...trimmed text...]

From a Jaguar TSB…

Spark Plug "Blow-by Stain"/Corona Stain - Spark Plug Function Not Affected - Replacement Unnecessary

Issue:

Some vehicle may have spark plugs that have been affected by "Coron... Login to read more.

5 Replies Received (View Replies)