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High flow cat, do I need it remapped to clear the CEL?

jakeA42T Sep 7, 2012

  1. jakeA42T

    jakeA42T Member

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    Was told by AMD that it would cost roughly £500 to install the Sports Cat and remap it as it need to be done to clear the CEL, is this true?
    :think:
     
  2. Brodster

    Brodster Well-Known Member Team Ibis VCDS Map User Audi S4 Audi Avant Owner Group

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    If the sports cat is mated to the remainder of the matching sports exhaust then yes it needs to be remapped to take account of the increased air flow which causes the balance of air and petrol mix flowing into the engine to be upset. Although the engine management system will try to compensate by using the sensors on the car to calculate the changes it is quite possible that the increased airflow will cause this mixture to be lean (too much air and not enough fuel). This is where the remap is needed.
     
    Last edited: Sep 7, 2012
  3. jakeA42T

    jakeA42T Member

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    At the moment I only have a stock exhaust, thought maybe a spacer would help not sure I really want to remap it yet.
     
  4. hades-

    hades- Well-Known Member VCDS Map User

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    a spacer will keep the light off in most cases
    sometimes they just dont work tho.
     
  5. hades-

    hades- Well-Known Member VCDS Map User

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