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Secondary Air Filter

Discussion in '1st Gen. Tacomas (1995-2004)' started by R6L8ver, Feb 1, 2008.

  1. Feb 1, 2008 at 3:21 PM
    #1
    R6L8ver

    R6L8ver [OP] Member

    Joined:
    Feb 1, 2008
    Member:
    #4526
    Messages:
    5
    Vehicle:
    Shortbed, Regular Cab, 4X4
    I just joined this forum today with the purpose of improving HP and gas mileage on my 99 2.7 Tacoma. I read somewhere about taking out the secondary air filter. I have a few questions:

    What is that?
    Where is it?
    How do I take it out?
    Will it affect anything negatively?
    What is it supposed to help?
    What else can I do to improve MPG's and HP?

    I'm not even really worried about HP, otherwise I wouldn't have bought a 2.7 Tacoma. My father-in-law is an Amsoil dealer, so I just switched over to Amsoil oil and filters and I've consciously dropped my speed by about 10mph on the highway and I'm not really seeing much of a difference. Right now, I'm getting about 19.5mpg which I don't think is that great for a 4 cylinder. Everyone asks me what mpg I get and they're all suprised with the usual response being "Wow, I'd have thought you'd have gotten better mileage out of a small enging like that". ME TOO!! I searched quite a bit and found information on the newer trucks in the 1st Gen forum, but couldn't find much about my 99. Any help would be appreciated.
     
  2. Feb 1, 2008 at 3:27 PM
    #2
    Roland

    Roland My other ride has sails

    Joined:
    Jan 8, 2008
    Member:
    #4149
    Messages:
    2,401
    Gender:
    Male
    Rhode Island
    Vehicle:
    06 Impulse Red I4 2WD Access Cab
    UnderCover Tonneau, Bed mat, Bug Deflector, aFe Pro Dry S, Secondary Air Filter removed, Synthetic 5W-30 oil, Scanguage II with blendmount, WeatherTech floorliners, Toyota seat covers, Installed OEM intermittent wipers, TacomaWorld sticker, Defrost without AC mod, Hidden Hitch
    I'm pretty sure you don't have the secondary filter. It was added to appease the tree huggers starting with the 2005 model.
     
  3. Feb 1, 2008 at 3:30 PM
    #3
    R6L8ver

    R6L8ver [OP] Member

    Joined:
    Feb 1, 2008
    Member:
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    Messages:
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    Vehicle:
    Shortbed, Regular Cab, 4X4
    yeah, I was looking around and i guess I asked before I read up...still a newb on this.
     
  4. Feb 2, 2008 at 5:25 AM
    #4
    Janster

    Janster Old & Forgetful

    Joined:
    Mar 25, 2007
    Member:
    #1138
    Messages:
    14,256
    Gender:
    Female
    First Name:
    Jandy
    Lancaster, PA
    Vehicle:
    2016 GMC Canyon SLT w/ LineX and....
    Yeah, only 2005+ models.

    Just an FYI for anyone else to read the thread...

    It's a thin filter (reminds me of a fishtank filter) with carbon stuff in it I think. It's like 1/4" thick (if I had to guess) and mounts inside the airbox in front of (engine side) of the air filter.

    I took mine out.
     
  5. Feb 2, 2008 at 6:45 AM
    #5
    concrete jedi

    concrete jedi Well-Known Member

    Joined:
    Oct 20, 2007
    Member:
    #3142
    Messages:
    2,741
    Rochester N.Y
    Vehicle:
    06 Tacoma 4 door indigo blue
    Broken and scratched tailgate, cracked rear tail light lens, coffee stain in driver seat.
    I resemble that remark, but me and my tree are friendly, there is plenty of room over here, I'll save you a seat. :)
     
  6. Feb 2, 2008 at 6:46 AM
    #6
    concrete jedi

    concrete jedi Well-Known Member

    Joined:
    Oct 20, 2007
    Member:
    #3142
    Messages:
    2,741
    Rochester N.Y
    Vehicle:
    06 Tacoma 4 door indigo blue
    Broken and scratched tailgate, cracked rear tail light lens, coffee stain in driver seat.
    Oh by the way my favorite tree is a Norwegian spruce. :D
     
  7. Feb 2, 2008 at 8:08 AM
    #7
    Roland

    Roland My other ride has sails

    Joined:
    Jan 8, 2008
    Member:
    #4149
    Messages:
    2,401
    Gender:
    Male
    Rhode Island
    Vehicle:
    06 Impulse Red I4 2WD Access Cab
    UnderCover Tonneau, Bed mat, Bug Deflector, aFe Pro Dry S, Secondary Air Filter removed, Synthetic 5W-30 oil, Scanguage II with blendmount, WeatherTech floorliners, Toyota seat covers, Installed OEM intermittent wipers, TacomaWorld sticker, Defrost without AC mod, Hidden Hitch
    My contribution to the "green" movement is sailing. Wind moves us and solar powers us so my total fuel use is less than 15 gallons a year for 6 months of fun on a 35 ft boat! :humble:
     
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