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06 occansional no start

  1. 2006 occasional no start - any ideas?

    6.0L Problems Forum
    New to the forum.. Great ideas The no start began when I upgraded the exhaust to 4" stainless, cat delete, arrow muffler. Doesn't make sense. Hot or Cold occasionally the truck won't start. Turn the key off, then on once or twice, it starts. So far, I'm fearful one time it won't. Bulletproof...