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  1. #1
    Established Member Two Rings monkeesa6's Avatar
    Join Date
    Sep 25 2011
    AZ Member #
    81708
    My Garage
    1993 Jeep Grand Cherokee
    Location
    Seattle

    seattle area emission testing.....

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    got a new set of downpipes for the car, and this is the information that i was given in a message...

    "straight pipes delete the rear cats, you can have them coded out/work out an o2 defouler/spacer setup"

    basically, i have never had to take a car through emissions, so i dont know what they check and if i delete the rear cat and code it out, if im just gonna have to put one back in for the emissions testing.

    if they dont do that sort of check, then how do i go about just coding it out? Or, is it something that i should just get the spacer for?

    Thanks,

    Zak

  2. #2
    Senior Member Three Rings 04 S4's Avatar
    Join Date
    Nov 01 2011
    AZ Member #
    83305
    My Garage
    2005 Ford E250 Work van
    Location
    Bonney Lake, WA

    If you still have the front cats youll pass the obdII test. otherwise you will need to get spacers to make the computer think they are there. coding them out will still cause you to fail
    2004 S4 (Tip) - Dolphin Grey metalic Traded 4/3/13
    2009 Q7 Prestige S-line - Daytona Grey

  3. #3
    Established Member Two Rings monkeesa6's Avatar
    Join Date
    Sep 25 2011
    AZ Member #
    81708
    My Garage
    1993 Jeep Grand Cherokee
    Location
    Seattle

    ok, so the pipes have a cat built into them, with o2 bungs before and after. this in theory, should be the only one i need?

  4. #4
    Senior Member Three Rings 04 S4's Avatar
    Join Date
    Nov 01 2011
    AZ Member #
    83305
    My Garage
    2005 Ford E250 Work van
    Location
    Bonney Lake, WA

    yup, you should be fine. if you throw a check engine light for cat/ o2 sensors after install...then you will need to get it fixed, but you are fine as is.
    2004 S4 (Tip) - Dolphin Grey metalic Traded 4/3/13
    2009 Q7 Prestige S-line - Daytona Grey

  5. #5
    Senior Member Four Rings Charles.waite's Avatar
    Join Date
    Jun 27 2011
    AZ Member #
    77478
    My Garage
    2004 A4 1.8TQ 6MT USP 2006 A4 Avant 2.0T tip
    Location
    Seattle, WA

    Do we not have NOx emissions testing here in Washington?

    I always thought we had fairly stringent testing here, at least in King County. Do they just test ODB2 readiness, they don't test tailpipe emissions as well?

    I've only had to get one car tested in my life here so I am not very aware of what kind of tests they run.
    -CP
    USP CLUB MEMBER #136
    2004 A4 1.8TQ 6MT USP - APR Stage 1+ - FSI Coils - BKR7EIX-11 - 034 Rear Swaybar (Soft Setting) and Endlinks - B6S4 Front + B7A4 Rear Brakes - 034 Street Trans Mount
    2008 Black Unicorn (2.0t S-Line Ti 6MT Avant) - Bosch FR6KPP332S
    SOLD -- 2006 A4 2.0TQ Avant Tiptronic stocker - Failing TC Mod

  6. #6
    Veteran Member Three Rings AvantinUSP's Avatar
    Join Date
    Jul 28 2008
    AZ Member #
    31365
    Location
    Seattle

    on older cars they do. Not sure what the cutoff is but on my 04 they didn't, just OBD

  7. #7
    Veteran Member Four Rings Pothole's Avatar
    Join Date
    Jun 02 2008
    AZ Member #
    29482
    My Garage
    2004 Audi A4 1.8T Quattro 6Spd, 1997 Jetta Trek
    Location
    Cathcart, Washington

    they do the sniff test on pre obd2 cars, older than 1997, and maybe if they think you have messed with your car to much, but all new cars they just plug in and see what the computer is reading
    Please Drive Right

    FS: TT ballast, GTI Stock Springs, 2.0 Cams

  8. #8
    Senior Member Three Rings Unum's Avatar
    Join Date
    Dec 14 2010
    AZ Member #
    68261
    My Garage
    Metro Bus
    Location
    Seattle, WA

    Funny story..

    My buddies 2001 Cobra Mustang (highly modified) was blowing blue smoke, w/ no cats when he got it tested. But he put in a 2001 ECU of a stock cobra in the parking lot of the facility. Ran it into the bay, they plugged it in, ran no codes. Bam. Passed.
    -Chris

    No car. Putting money in the bank for home #2.

  9. #9
    Established Member Two Rings monkeesa6's Avatar
    Join Date
    Sep 25 2011
    AZ Member #
    81708
    My Garage
    1993 Jeep Grand Cherokee
    Location
    Seattle

    so basically anything after 97 you just cant throw any codes when you go in for testing... interesting.

    anybody know how to go about coding out the rear o2? im not familiar with vag com coding, or would it be a better use to just run the spacer/defouler?
    ST coilovers APR tuned hella smoked rear taillights



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