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New Muffler Help

Discussion in 'Performance and Tuning' started by harmonius15, Jun 10, 2009.

  1. Jun 10, 2009 at 3:55 PM
    #1
    harmonius15

    harmonius15 [OP] Member

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    Will putting a new flowmaster muffler in trigger the check engine light? I'm only swapping the old muffler for a new flowmaster muffler not the whole exhaust system. Its an 09 4.0l V6 double cab. At the garage I stopped by at the guy told me changing mufflers would trigger the check engine light and cause other problems. Is this correct?
     
  2. Jun 10, 2009 at 3:57 PM
    #2
    tussery

    tussery Well-Known Member

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    Corpus Christi, Tx
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    Magnaflow muffler, TRD CAI.
    No the only way it will throw a code is if you remove emission parts from your exhaust system and the muffler is not an emission part.
     
  3. Jun 11, 2009 at 3:58 PM
    #3
    harmonius15

    harmonius15 [OP] Member

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    So I should have no problems with the engine running lean and triggering the light?
     
  4. Jun 11, 2009 at 4:00 PM
    #4
    tacoskim

    tacoskim Tuned By Gadget

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    no u will not have problems.. the 02 sensors are way before ur muffler, so ur fine, you will not throw a code
     
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