Where does the hose from the air filter housing go..?

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  1. #1
    Join Date
    Jul 2007
    Chicago, IL

    Where does the hose from the air filter housing go..?

    Again newbie questions here.. I am doing my first DIY. MAF cleaning and removed the air filter housing in the process, without paying attention to where the hose is connected to..

    Please see the pic below..

    I would appreciate if anybody points out where the open end would connect..? I tried looking in Haynes manual..but no luck..

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  3. #2
    Akhristov? Hey, that guy owes me money!
    Join Date
    Oct 2009
    King City, CA
    Is your engine an AEB or ATW? I looked at my AEB, and the air box doesn't seem to have a hose.

  4. #3
    3rd Gear
    Join Date
    Aug 2002
    Plano, TX - GLX 5Spd
    The broken hose is the intake hose to SAIP pump. This is a very common problem since it is very easy to break at the lower end of the hose when people are trying to take the air filter box out. You will have to take the belly pan down to see the other piece which is attached to the SAIP pump. Mine broke too and I just duck taped it back since the new hose is pretty expensive.

    There is another thread today asking the same question:

    airfilter is clean after a year

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  6. #4
    Motel Room Moderator VAGguy's Avatar
    Join Date
    May 2006
    Abingdon, MD
    Um, you are supposed to remove that hose and any others from the airbox lid BEFORE you rip it off. rookie mistake I guess.

  7. #5
    Moderate Moderator Steve in Chicago's Avatar
    Join Date
    Jul 2008
    You'll want to repair or replace that hose so the SAIP breathes in only dry/filtered air. Water and dirt shorten the life of the SAIP.

    The SAIP only runs for a short while during cold start. It sucks in filtered air from the airbox, draws it down through that hose, through the SAIP, then pumps it out another hose to the Combi Valve at the back of the head. This air then gets injected into the exhaust path where it mixes with unburnt fuel (rich mixture during cold start) and the added oxygen helps to complete combustion of unused hydrocarbons. This "after-burn" effect also helps to get the CAT up to operating temperature faster.

    If the SAIP system stops working, you'll get an emissions CEL and a replacement pump is more expensive and more difficult to replace than that hose. If you duct tape it, check the tape seasonally to be sure it's still holding. The metal foil tape used for duct work may hold up better in the long term than the cloth style duct tape.

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