Question about 1999 Ford Econoline

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I have a 1999 4.2 econoline. On light acceleration, in gear or parked, the engine shakes violently. It idles smooth and heavy acceleration is smooth. Engine code indicated a cylinder 3 misfire. Wires and plugs were replaced. Would the coil pack be malfunctioning or should i be looking elsewhere for the problem?

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Looking elsewhere for the problem

Posted on Apr 27, 2010

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