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January 1, 2000 Service bulletin

Some vehicles equipped with a 3.8L engine may exhibit spark knock on heavy accel with 87 octane fuel

Ford technical service bulletin 14439 for 1999-2000 Ford Mustang.

Bulletin number
14439
Component
Engine and engine cooling: engine: gasoline
Summary
Some vehicles equipped with a 3.8l engine may exhibit spark knock on heavy accel with 87 octane fuel. Hot weather and lower octane fuel may exaggerate the condition. Tt

Owners of these vehicles have filed 70 complaints in the engine category.

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