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Spark Plug Change on E-350/V10
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05-10-2011, 08:31 PM
Grems4ever
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Join Date: Aug 2009
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Well, 303, 304, & 308 are misfire codes on cylinders 3,4, and 8.
I suspect that you have some bad coils on there. Before you run out and buy coils, check the boots and springs to make sure you've got good contact between the coil and plug.
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