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4Runner Dump Valve Exhaust

Discussion in '4th Gen 4Runners (2003-2009)' started by TheWhite4Runner, Jun 23, 2016.

  1. Jun 23, 2016 at 9:14 AM
    #1
    TheWhite4Runner

    #1
    TheWhite4Runner [OP] New Member

    Joined:
    Jun 23, 2016
    Member:
    #2199
    Messages:
    3
    Gender:
    Male
    First Name:
    ZAck
    Vehicle:
    2004 White 4Runner SR5 4WD
    Bull Bar, Dump Exhaust
    I put in a Dump valve exhaust in my 2004 4Runner it's a California model with 4 cats. It is after the Cats but before the muffler. Will this do damage to my engine/cats overtime keeping the exhaust open the majority of the time. And would it throw up code's with the valve closed. The valve is not welded on, or would it be better to take it off to avoid all problems.
     
    Last edited: Jun 23, 2016
    TheWhite4Runner, Jun 23, 2016
    #1
  2. Jun 23, 2016 at 6:58 PM
    #2
    wnelax04sr5

    #2
    wnelax04sr5 New Member

    Joined:
    Apr 6, 2014
    Member:
    #12
    Messages:
    2,580
    Gender:
    Male
    First Name:
    Ethan
    CT
    Vehicle:
    2004 SR5 4X4 Galactic Gray
    i don't think it will cause any problems because its downstream of the o2 sensors
     
    wnelax04sr5, Jun 23, 2016
    #2
  3. Jun 24, 2016 at 3:36 PM
    #3
    TheWhite4Runner

    #3
    TheWhite4Runner [OP] New Member

    Joined:
    Jun 23, 2016
    Member:
    #2199
    Messages:
    3
    Gender:
    Male
    First Name:
    ZAck
    Vehicle:
    2004 White 4Runner SR5 4WD
    Bull Bar, Dump Exhaust
    would the O2 sensors pick up anything from back presser?
     
    TheWhite4Runner, Jun 24, 2016
    #3
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