Rev Hang

Discussion in 'Fiesta ST Maintenance' started by CarefreeAZ, Jun 7, 2014.

  1. CarefreeAZ

    CarefreeAZ Active Member

    I have on a few occasions experienced rev-hang when downshifting, most noticeably to the lowest gears. It is momentary and inconsistent. Anyone else experience a similar condition?
     
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  3. Zormecteon

    Zormecteon Active Member

    I haven't noticed it in the FiST, but in my Focus ZX3, it happens occasionally. Have you had it happen more when the car is "cold"? The behavior is most often associated with emissions equipment that makes the engine run on, rather than dumping raw fuel out the exhaust and on into the catalytic converter.
     
  4. CarefreeAZ

    CarefreeAZ Active Member

    No, it was fully warmed up and probably driven "fast".
     
  5. crzyworm623

    crzyworm623 Member

    There are a few threads, I'm sure one or two on this forum but def in one of the other two fiesta St forums that talk all about the Rev hang issue. Between emissions and the heavy dual mass fly wheel it's common. Seems the Cobb ap helps but bit eliminates the issue

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