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  1. #1
    Established Member Two Rings
    Join Date
    Feb 11 2004
    AZ Member #
    30
    Location
    Los Angeles, CA

    Vaccum Line Diagram

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    Does anyone have a diagram of the vacuum lines for a 2001 A4?

    I did a quick search, but could not find one.

    TIA!
    AWL18
    2001 A4 1.8TQ w/ Tip
    Sport and Convenience Package
    Plus some mods...

  2. #2
    Veteran Member Three Rings 2001A4QUATTRO's Avatar
    Join Date
    Jun 05 2007
    AZ Member #
    18561
    My Garage
    2001.5 A4 1.8TQMS
    Location
    Maryland

    Re: Vaccum Line Diagram

    X2

  3. #3
    Veteran Member Four Rings
    Join Date
    Feb 11 2004
    AZ Member #
    38
    My Garage
    1999 A4 1.8TQ
    Location
    San Jose, Ca

    Re: Vaccum Line Diagram

    Theres a diagram of the vacuum system pictured under the (stock) hood, or at least my car has one.

  4. #4
    Forum Moderator Four Rings Daft's Avatar
    Join Date
    Feb 17 2004
    AZ Member #
    620
    My Garage
    Stg 3 '04 A6 2.7T, 00 A4 2.8Q
    Location
    Bowie, MD

    Re: Vaccum Line Diagram

    I still have one in my picture gallery:

    2001 1.8T Vacuum Diagram (AWM Motor)

    Brett - Moderator
    Issue?: email me.
    _____________________
    Stage 3 2004 A6 2.7T 6M

  5. #5
    Established Member Two Rings
    Join Date
    Feb 11 2004
    AZ Member #
    30
    Location
    Los Angeles, CA

    Re: Vaccum Line Diagram

    Thanks!

    Any chance you have the legend to go with that?
    AWL18
    2001 A4 1.8TQ w/ Tip
    Sport and Convenience Package
    Plus some mods...

  6. #6
    Veteran Member Four Rings HIERLEVELZ's Avatar
    Join Date
    Apr 16 2007
    AZ Member #
    17316
    Location
    Queens

    Re: Vaccum Line Diagram

    AEB motor? i know there are some suttle differences.

  7. #7
    Veteran Member Three Rings
    Join Date
    Oct 27 2006
    AZ Member #
    12913
    My Garage
    Pearl 98.5 Audi A4 1.8T
    Location
    Fargo, ND

    Re: Vaccum Line Diagram

    KEY TO DIAGRAM ABOVE for AWM motor
    Connection diagram for charge air control and vacuum pressure control

    1 - to EVAP canister
    2 - EVAP Canister Purge Regulator valve -N80-
    3 - Non-return valve for EVAP canister
    Between EVAP canister and intake line in front of exhaust turbocharger
    Note position (light side/ dark side) as shown in Fig; arrow faces in direction of flow
    4 - Air cleaner
    With Mass Air Flow (MAF) sensor -G70-
    5 - Turbocharger
    Check charge pressure Page 21-8
    6 - Combination valve for secondary air injection
    7 - Fuel pressure regulator
    8 - To brake servo
    9 - Non-return valve
    Between brake servo and intake line
    Note position (light side/ dark side) as shown in Fig; arrow faces in direction of flow
    10 - Suction jet pump
    11 - Non-return valve
    Between brake servo and intake line
    Note position (light side/ dark side) as shown in Fig; arrow faces in direction of flow
    12 - Vacuum reservoir
    Location: In front left wheel housing beneath wheel housing liner
    13 - Secondary Air Injection (AIR) Solenoid valve -N112-
    Location: Below intake line
    14 - Crankcase breather
    15 - Non-return valve
    Between EVAP canister and intake line
    Note position (light side/ dark side) as shown in Fig; arrow faces in direction of flow
    16 - From Leak Detection Pump (LDP) -V144-
    17 - Charge air cooler
    With Charge Air Pressure sensor -G31-
    18 - Throttle Valve Control Module -J338-
    19 - Recirculating valve for turbocharger -N249-
    Location: below intake line
    20 - Intake manifold
    With Intake Air Temperature (IAT) sensor -G42-
    21 - Vacuum unit for charge pressure control
    22 - Wastegate Bypass Regulator valve -N75-
    Checking Page 21-33
    23 - Mechanical air recirculation valve
    Checking Page 21-24
    24 - Crankcase breather pressure regulating valve
    25 - Secondary Air Injection (AIR) Pump motor -V101-


    Charge air regulation, overview for engine code AEB

    Vehicles with manual transmission
    1 - Pressure regulator valve
    For crankcase ventilation
    2 - Evaporative Emission (EVAP) canister purge regulator valve -N80-
    3 - To Evaporative Emission (EVAP) canister
    4 - Check valve for Evaporative Emission (EVAP) canister
    Installed position (light/dark): as shown in illustration
    5 - Turbocharger
    6 - Fuel pressure regulator
    7 - Intake manifold
    8 - To Leak Detection Pump (LDP) -V144-
    9 - Crankcase ventilation
    10 - Check valve for Evaporative Emission (EVAP) canister
    Installed position (light/dark): as shown in illustration
    11 - Charge air cooler
    12 - Pressure unit
    For wastegate
    13 - Charge pressure bypass valve
    Checking Page 21-11
    14 - Wastegate bypass regulator valve -N75-


    Charge air regulation / secondary air vacuum control, overview for engine code ATW
    1 - EVAP canister
    2 - From fuel tank
    3 - Evaporative Emission (EVAP) canister purge regulator valve -N80-
    4 - Check-valve for EVAP canister
    Between EVAP canister and intake manifold before turbocharger
    Installation position (light/dark side): Arrow points in direction of flow, as shown
    5 - Air cleaner
    6 - Turbocharger
    Check charge air pressure Page 21-51
    7 - Combination valve for secondary air injection
    8 - Fuel pressure regulator
    9 - To power brake booster
    10 - Check valve
    Installation position (light/dark side): Arrow points in direction of flow, as shown
    11 - Vacuum booster
    12 - To Leak Detection Pump (LDP)
    13 - Vacuum reservoir
    14 - Distributor piece
    15 - Check valve
    Installation position (light/dark side): Arrow points in direction of flow, as shown
    16 - Secondary Air Injection (AIR) solenoid valve -N112-
    17 - Crankcase vent
    18 - Check valve
    Installation position (light/dark side): Arrow points in direction of flow, as shown
    19 - To tank Leak Detection Pump (LDP) -V144-
    20 - Check valve
    Installation position (light/dark side): Arrow points in direction of flow, as shown
    21 - Charge air cooler
    With charge air pressure sensor -G31-
    Checking -G31- Page 21-63
    22 - Throttle valve control module -J338-
    23 - Recirculating valve for turbocharger -N249-
    Checking Page 21-45
    24 - Intake manifold
    With Intake Air Temperature (IAT) sensor -G42-
    25 - Pressure unit
    For wastegate
    26 - Wastegate bypass regulator valve -N75-
    Checking Page 21-57
    27 - Mechanical recirculation valve
    Checking Page 21-43
    28 - Pressure control valve for crankcase ventilation
    29 - Secondary Air Injection (AIR) pump motor -V101-

    1998.5 1.8TQT (SOLD)

    Joined the Dark Side
    2008 Honda Pilot SE

  8. #8
    Established Member Two Rings
    Join Date
    Feb 11 2004
    AZ Member #
    30
    Location
    Los Angeles, CA

    Re: Vaccum Line Diagram

    Thanks!
    AWL18
    2001 A4 1.8TQ w/ Tip
    Sport and Convenience Package
    Plus some mods...

  9. #9
    Senior Member Two Rings
    Join Date
    Mar 24 2006
    AZ Member #
    10996
    Location
    pottstown, PA

    Re: Vaccum Line Diagram

    I keep a copy in my glove box!

  10. #10
    Veteran Member Four Rings Kyle H's Avatar
    Join Date
    Sep 21 2006
    AZ Member #
    11850
    My Garage
    98 A4 1.8tQM
    Location
    San Diego, CA

    Re: Vaccum Line Diagram

    Quote Originally Posted by akielb View Post
    Charge air regulation, overview for engine code AEB

    Vehicles with manual transmission
    1 - Pressure regulator valve
    For crankcase ventilation
    2 - Evaporative Emission (EVAP) canister purge regulator valve -N80-
    3 - To Evaporative Emission (EVAP) canister
    4 - Check valve for Evaporative Emission (EVAP) canister
    Installed position (light/dark): as shown in illustration
    5 - Turbocharger
    6 - Fuel pressure regulator
    7 - Intake manifold
    8 - To Leak Detection Pump (LDP) -V144-
    9 - Crankcase ventilation
    10 - Check valve for Evaporative Emission (EVAP) canister
    Installed position (light/dark): as shown in illustration
    11 - Charge air cooler
    12 - Pressure unit
    For wastegate
    13 - Charge pressure bypass valve
    Checking Page 21-11
    14 - Wastegate bypass regulator valve -N75-
    So what kind of tubing do i need to get to replace all of my vacuum lines? Can I just go to napa and tell them i need vac line tubing and be done? do I need clips to hold the tubing on, or are they press-fit?

    Thanks!
    The most heavily built K03'd engine on Audizine...

    "Einstein: Any man who can drive safely while kissing a pretty girl
    is simply not giving the kiss the attention it deserves. "

    because racecar.

  11. #11
    Veteran Member Four Rings Kyle H's Avatar
    Join Date
    Sep 21 2006
    AZ Member #
    11850
    My Garage
    98 A4 1.8tQM
    Location
    San Diego, CA

    Re: Vaccum Line Diagram

    Anyone?
    The most heavily built K03'd engine on Audizine...

    "Einstein: Any man who can drive safely while kissing a pretty girl
    is simply not giving the kiss the attention it deserves. "

    because racecar.

  12. #12
    Veteran Member Four Rings audiness's Avatar
    Join Date
    Jan 26 2007
    AZ Member #
    15163
    Location
    Charleston SC

    Re: Vaccum Line Diagram

    On the underside of my hood there is a sticker that has the vaccum diagram on it.

    doesn't anyone else's car have this?

  13. #13
    Registered Member Two Rings kextyn's Avatar
    Join Date
    Sep 15 2005
    AZ Member #
    7964
    My Garage
    2001 A4 1.8TQM
    Location
    Virginia Beach

    Re: Vaccum Line Diagram

    Quote Originally Posted by Kyle H View Post
    So what kind of tubing do i need to get to replace all of my vacuum lines? Can I just go to napa and tell them i need vac line tubing and be done? do I need clips to hold the tubing on, or are they press-fit?

    Thanks!
    Most of the lines are the same but I think there's one slightly bigger one from the DV. You can buy it online at a place like ecstuning or get it from your dealership. I have had issues getting any at parts stores because they tend to be out of stock. They don't carry much and it's like everyone wants it. I put mine on with zip ties and haven't had a problem yet. The stock clamps are a real PITA to get off too.

  14. #14
    Veteran Member Four Rings savetheclutch's Avatar
    Join Date
    Oct 01 2006
    AZ Member #
    12183
    My Garage
    ducatis and a miata
    Location
    Fort Lee, NJ
    Items for Sale

    Re: Vaccum Line Diagram

    If I put a longer tube, would that cause the car to loose boost?? I installed a boost gauge, at the beggining I was boosting 21 (it was connected at the small line that goes to the fpr, but then I connected it to the line that goes to the intake manifold (#20) and I put a longer tube and it now it is not going above 15psi??
    AKA: andresito360

  15. #15
    Veteran Member Four Rings SurferForever's Avatar
    Join Date
    Nov 28 2006
    AZ Member #
    13732
    My Garage
    01 A4 1.8TQM
    Location
    Warren, NJ

    Re: Vaccum Line Diagram

    Which size tubing would i need to re-do majority of my vac lines? Thats different then the Diverter valve/fpr lines? What size is that? Anybody know approx how much tubing (ft.) is needed to re-do the whole system if i were bored one day?

    http://store.summitracing.com/egnsea...20630&D=320630
    Natasha: 01 A4 2.0 T28/T04 || Silver (Fastest Color)

    034 Motor and Tranny Mounts | Full 3" exhaust with HFC | APR Snub | B&M Short Shifter | APR Boost Gage | RS4 Grill w/ Custom Matched Lowers | 8000k Headlights | 3000K Fogs | M3 Lip Spoiler | Reiger Roof Spoiler | Debadged | Clear Corner Mod | Independent Fogs | Dual Rear Fogs | Zimmerman Cross-Drilled Rotors | Mintex Pads | SS Braided Lines | 18X8 Black ASA AR1's



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