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underboost

  1. S60 (2001-2010)
    My 02 s60 awd isnt hitting full boost. I have 2-3psi at wot and it wont go past that, EXCEPT when it shifts it hits full boost. I have already replaced tcv and all lines, all clamps are tight. I was thinking maybe a cbv issue? It makes the whoosh noise when i let off even at 0psi. Would like to...
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