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  1. Ford F-Series, Ford Super Duty, Ford Diesel
    I have an 08 250 super duty and I'm having some trouble getting it to run smoothly...the 5.4 had a small skip when I first got it but ran great,when I ran the code it said number 6 cylinder misfire and cats also came up.since then I've replaced plug and coil pack on number 6 and went straight...
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