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Re: Ford's new spark plug design might spell trouble
Posted to Technical Tips Forum on 12/9/2005 2 Replies

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Hi Matt, According to TSB 05-25-05 the latest design level plugs are marked with PZT-1F on the insulator, as yours are in the picture.[2005 Ford Expedition, Ignition Photo] Are there different plugs a... Login to read more.

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