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backpressure valve

  1. 99-03 7.3 Motor Problems
    Hello all, I have a 2001 7.3 with 230K miles on it. I rebuilt the backpressure valve assembly a couple years ago, new guts, seals etc and it has been working fine last winter. Now that is getting cool enough to start using it again I have noticed that after it kicks in for a minute or so it...