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pcv valve

  1. abstract

    Catch Can Installation [Correct Way]

    Hello fellow enthusiasts! As this is my first post on the forums, I'm going to talk about one of the first things I did when I purchased my Mk1 Leon Cupra R. There are so many indecisive guides and threads out there that either provide the wrong information, or haven't got enough info to...
  2. PCV delete and MOT emissions!

    Hi there, I've been having problems with a high idle when the engine is warm on my 07 Leon FR tfsi. I replaced the front PCV valve with a revised OEM one last year, there seems to be some subtle hissing coming from it, although I can't tell where. Checked the seals on the pipes and back plate...
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