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My guess would be valve seals in the engine. The earlier year 4.6 L V8 was problematic for early failure of valve seals. If it smokes worse after idleing, and then clears up somewhat that should be your problem. I would guess somewhere between $400 - $800 for repair. Low end at a independent mechanic, high end for a dealership.

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13y ago

What else can I help you with?