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July 1, 1999 Service bulletin

Exhibiting engine spark knock on heavy acceleration with 87 octane fuel

Ford technical service bulletin 6647 for 1999 Ford Windstar.

Bulletin number
6647
Component
Engine and engine cooling: engine: gasoline
Summary
Exhibiting engine spark knock on heavy acceleration with 87 octane fuel. Tt

Owners of these vehicles have filed 136 complaints in the engine category.

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