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How do exhaust leaks affect engine performance?

Discussion in 'Exhaust' started by Baldwin, Jul 7, 2010.

  1. Baldwin

    Baldwin New Member

    Jun 22, 2010
    Will a leak in an exhaust system help or hinder the performance of an engine? Is the answer to this question dependant on the location (i.e. manifold, exhaust pipe, muffler, etc) and the size of the leak?

    Acai Max
  2. navylife59

    navylife59 Super Moderator Staff Member

    Mar 22, 2006
    Emory, Texas or Gretna, LA
    Exhaust leaks any where near O2 sensors (before or after) can give false readings to the ECM thus giving poor performance. Minor exhaust leaks elsewhere usually only precipitate as annoying sounds and do not effect performance. Large leaks, however, can reduce the backpressure enough to alter tuning and can also cause disruption of smooth gas flow.
  3. Turbo_TC05

    Turbo_TC05 New Member

    Sep 22, 2010
    Exhaust leaks can lead to fowling out o2 sensors, if not fowling them out cause your car to read lean or rich costing you more in fuel. Now if the exhaust leak is on the exhaust manifold it can actually burn the exhaust valves on the engine.
  4. mark_hou

    mark_hou New Member

    Oct 11, 2010
    exhaust leak = poor performance
  5. acaimaxcleansecanada

    acaimaxcleansecanada New Member

    Nov 21, 2010
    if the exhaust leak is on the exhaust manifold it can actually burn the exhaust valves on the engine. Acai Max Cleanse

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