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Thread: What does this hose do?

  1. 02-18-2011 04:00 PM #1
    justin
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    Default What does this hose do?

    Car has "hiccups" here and there and I could feel it running a little funny and now I think I found the problem... what system/job does this hose have?





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  3. 02-18-2011 05:26 PM #2
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    I can't see shit, captain!


    lol, may be relevant

    http://www.audizine.com/forum/showth...fication/page2


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  4. 02-18-2011 09:12 PM #3
    Type_Audi
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    Dude, I just changed that hose yesterday. It connects to the secondary air pump which runs when you first start the car in the morning to pump more oxygen into the Cat's to warm them up more quickly.

    I bought a new one on ECSTuning, http://www.ecstuning.com/Search/058133785/ES277667/

    Mine was hard as a rock from all of the intense heat cycles it's seen over the past 7 years (mine is an 04 A4 1.8TQ). The new one is soft like a rubber hose should be.

    FWIW mine broke in the exact same location. I used a 90deg pick and a sharp blade to split the hose down the metal then peeled it away from the hose. Be sure to cover the hard metal hose so you don't drop any rubber chunks in it.
    06' B7 S4, Blue, White Interior, Premium Package, Bose, Carbon Accents, 52k miles, DIY's Performed to date: spark plugs, fuel/air filter, valve cover gaskets.

    04' B6 A4 1.8T Quattro 123k miles, DIY's Performed to date: Timing Belt/Waterpump, Window Guide (x2), HID Capsules, Auto Transmission Fluid, entire suspension, MAF, Rear Brakes/Rotors, O2 Sensor, PS fluid flush, rear coolant flange, fuel door (?).

    Past: 86' 944 Turbo (still my fav), 05' Boxster
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  5. 02-18-2011 09:17 PM #4
    justin
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    Thanks guys! Type Audi... did you notice any issues that lead you to discover the hose was bad or just found it?
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  6. 02-18-2011 09:32 PM #5
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    Quote Originally Posted by justin View Post
    Thanks guys! Type Audi... did you notice any issues that lead you to discover the hose was bad or just found it?
    Yeah it just sounded a lot louder, mainly a high pressure air leak type of sound. That secondary air pump is seriously powerful. Other than that I didn't notice any bad running conditions.
    06' B7 S4, Blue, White Interior, Premium Package, Bose, Carbon Accents, 52k miles, DIY's Performed to date: spark plugs, fuel/air filter, valve cover gaskets.

    04' B6 A4 1.8T Quattro 123k miles, DIY's Performed to date: Timing Belt/Waterpump, Window Guide (x2), HID Capsules, Auto Transmission Fluid, entire suspension, MAF, Rear Brakes/Rotors, O2 Sensor, PS fluid flush, rear coolant flange, fuel door (?).

    Past: 86' 944 Turbo (still my fav), 05' Boxster
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