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what is this hose?

This is a discussion on what is this hose? within the General Help forums, part of the LSx Technical Help Section category; I have a hose on the drivers side that doesnt go anywhere, it originates from the front and goes halfway ...

  1. #1
    Member DemonSpeed's Avatar
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    Pewter Metallic
    1999 Trans Am

    what is this hose?

    I have a hose on the drivers side that doesnt go anywhere, it originates from the front and goes halfway back and just stops. I recently swapped my ls1 for an ls6 and ever since at startup I get an annoying whine from the engine bay, well i got to listening and it comes from this hose. It blows air and whines for a minute or so at startup and at times when im driving but not on the gas. When I look at pics of other engines bays theres a hose that runs up the side but goes all the way back, not like mine. Anybody know?
    LS6 Engine swap, Custom Predator Tune, Lid, SLP Cold Air, Ram Air H.O. Hood, Hooker Long Tubes, !Cats, 3" True Duals w/Dynomax Bullets, Performabuilt stage 2 w/3600 stall, B&M Trans. Cooler, Moser 12 Bolt w/ 3.73's

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  2. #2
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    that goes to your a.i.r. pump. The noise and blowing air is from the pump. Evidently you don't have the rest of the air system there. Just pull it off if that's the case. In the meantime you can pull the fuse and relay for the air pump which is located directly behind the drivers headlight. There's an access panel underneath that allows access to it. Takes just a few minutes to remove.

  3. #3
    Member DemonSpeed's Avatar
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    Pewter Metallic
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    Thanks. whats the system for? im guessing the ls6 doesnt need it?

  4. #4
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    it injects air into the exhaust stream to heat the cats up quicker. I'm guessing someone ditched it with the headers. Do you have air provisions on the headers? Should be on the 1st primary I think on each side. It's a little post that sticks up off the header that has a flange on it. Those air lines connect to it and inject air into the exhaust stream.

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