What are these hoses (S16)?
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  1. #1
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    Default What are these hoses (S16)?

    My car has been running very badly lately - stalling at idle and not firing properly when revved, sometimes losing all power.

    The lower hose B connection is sucking air in. It's audibly wheezing and if you block it then the engine stalls almost immediately. Is this normal?

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    The lower connector for hose A is fairly oily inside. Is this normal?




  2. #2
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    No one knows what hose B is for?

  3. #3
    Fellow Frogger!
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    If I am not mistaken, hose B is the intake for the idle speed control sensor. It by-passes the throttle body when your foot is off the gas. Make sure it gets filtered air through it as it end up in the engine !

    The other oil breather hoses A & C are always going to be greasy.

  4. #4
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    Just read your post over again, so B is definately the idle speed controller, it may be getting a bit dirty and clogged up with oil and grease breathing through it causing it to stick. Pull it out and clean it as best you can (controller itself as well as the hose). That should solve your idle/stalling problems.

    Misfiring points at different problems, check your coil packs are in good order, plugs are not worn out, no rust/dirt on the connector to the coil pack cables, no cracked insulation on the coil pack cables etc...

    If all that fails, run a diagnostic to find the dead sensor !

  5. #5
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    Thanks for the reply. It's been at the mechanics for a while (but now they've closed up for the hols), they reckon plugs, coils, fuel filter, are all fine. Didn't fully check the injectors yet but they are firing.

    There was an error code to do with the oxygen sensor/engine running rich. Not sure whether the engine thinking it is running rich is causing that idle control valve to play up or the control valve playing up is causing the engine to run rich. It's wheezing a lot, so maybe it's partly blocked or maybe it's trying to pull through too much air.

    Is it an easy job to clean it out? Looks like access is tricky.

  6. #6
    Fellow Frogger!
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    You will need to pull it out to clean it, try using some kero, give it a bit of a spray a few times, and hopefully it will melt the gunk out of it. Let it dry well before it goes back in.

    In case you are not sure, it is the sensor with a 3 pin socket on it, visible from the top, right behing the throttle body.

    Also make sure the vacuum hose leading to the ecu is intact, it feeds to the map sensor.

    Another thing to check is that all the hoses and blocked off vaccum outlets in the front of the inlet manifold are also intact as vacuum leaks will make the engine run badly.

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