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  1. #1
    Senior Member Two Rings Preston_08's Avatar
    Join Date
    Apr 14 2014
    AZ Member #
    187316
    My Garage
    1998 Chevrolet C1500
    Location
    Richlands, VA

    Fluttering sound after boost

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    I noticed this a few days ago. When I accelerate and the turbo spools, after I let off the gas it makes a fluttering noise? I have. I clue what it is and how to cure it if it is a problem. Need answers


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  2. #2
    Veteran Member Four Rings getslideways's Avatar
    Join Date
    May 16 2008
    AZ Member #
    28851
    Location
    WA

    Based on your description it sounds like a torn diverter valve

  3. #3
    Veteran Member Four Rings BlazinB5's Avatar
    Join Date
    Nov 12 2010
    AZ Member #
    66938
    Location
    Stillwater, MN

    My wife's car did the same thing. Put in a 710n diverter and the sound went away

    Sent from my Galaxy S4 using Tapatalk
    2001 Allroad 2.7T
    2000 A6 4.2 (parted out)
    2003 A4 1.8T (sold)
    2002 A4 1.8T (sold)
    2001 A4 1.8T (sold)
    2001 A4 2.8 (sold)

  4. #4
    Veteran Member Four Rings
    Join Date
    Oct 21 2005
    AZ Member #
    8454
    Location
    y

    +1 on dv. Also check vacuum hose to dv. Could've torn or removed

  5. #5
    Veteran Member Four Rings Molotov's Avatar
    Join Date
    Feb 24 2007
    AZ Member #
    15888
    My Garage
    2005 USP 1.8TQM Avant
    Location
    Burlington, Vermont

    Quote Originally Posted by Preston_08 View Post
    I noticed this a few days ago. When I accelerate and the turbo spools, after I let off the gas it makes a fluttering noise? I have. I clue what it is and how to cure it if it is a problem. Need answers


    Sent from my iPhone using Tapatalk
    http://www.europaparts.com/diverter-...Fenm7AodHFwAJg
    - Scott

    Das Build Thread

    Performance parts for sale:
    MagnaFlow Race Muffler - Vibrant 4" Filter - MAF 4" Housing

  6. #6
    Veteran Member Four Rings freeloader700's Avatar
    Join Date
    Mar 23 2012
    AZ Member #
    90479
    My Garage
    '03 A4 1.8TQM
    Location
    The Hills, OR

    Do you have a boost gauge? Do you read vacuum at idle?
    2003 A4 1.8TQM // Motoza // GTRS // 550cc // TR18T // Forge Splitter // 034 RSB & End Links // V710 Gunmetal 19x8.5

    →→FrankenTurbo F21 BUILD←←

  7. #7
    Senior Member Two Rings Preston_08's Avatar
    Join Date
    Apr 14 2014
    AZ Member #
    187316
    My Garage
    1998 Chevrolet C1500
    Location
    Richlands, VA

    Thanks everyone! I haven't checked the vacuum line or anything yet, just noticed it a few days ago and haven't had the time to. And no boost gauge yet! Going to be my next purchase this coming Friday tho!


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  8. #8
    Veteran Member Four Rings freeloader700's Avatar
    Join Date
    Mar 23 2012
    AZ Member #
    90479
    My Garage
    '03 A4 1.8TQM
    Location
    The Hills, OR

    A boost gauge is essential to have. I had a torn diaphragm on my DV. This is what it was doing.


    Start up and rev



    Driving

    2003 A4 1.8TQM // Motoza // GTRS // 550cc // TR18T // Forge Splitter // 034 RSB & End Links // V710 Gunmetal 19x8.5

    →→FrankenTurbo F21 BUILD←←

  9. #9
    Senior Member Two Rings Preston_08's Avatar
    Join Date
    Apr 14 2014
    AZ Member #
    187316
    My Garage
    1998 Chevrolet C1500
    Location
    Richlands, VA

    Where is the DV located at? Easy to find location?


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  10. #10
    Veteran Member Four Rings freeloader700's Avatar
    Join Date
    Mar 23 2012
    AZ Member #
    90479
    My Garage
    '03 A4 1.8TQM
    Location
    The Hills, OR

    Yeah, access if from underneath. Here is location from the top.

    2003 A4 1.8TQM // Motoza // GTRS // 550cc // TR18T // Forge Splitter // 034 RSB & End Links // V710 Gunmetal 19x8.5

    →→FrankenTurbo F21 BUILD←←

  11. #11
    Veteran Member Four Rings n7plus1's Avatar
    Join Date
    Dec 19 2007
    AZ Member #
    23482
    My Garage
    2016 STI in WRBP / 2012 RDX SH-AWD w/Tech Package
    Location
    York, PA

    ^god that video got loud lol

  12. #12
    Veteran Member Four Rings freeloader700's Avatar
    Join Date
    Mar 23 2012
    AZ Member #
    90479
    My Garage
    '03 A4 1.8TQM
    Location
    The Hills, OR

    Haha yeah, a bit. If anyone know why the heck it's buzzing PM me.

    Anyone OP that's where it is


    Sent from my finger tips using Tapatalk
    2003 A4 1.8TQM // Motoza // GTRS // 550cc // TR18T // Forge Splitter // 034 RSB & End Links // V710 Gunmetal 19x8.5

    →→FrankenTurbo F21 BUILD←←

  13. #13
    Veteran Member Four Rings customa4's Avatar
    Join Date
    Apr 07 2011
    AZ Member #
    73592
    My Garage
    02 A4 1.8T CVT, 02 A4 1.8TQ 5spd, 92 Geo Prizm
    Location
    CT

    Quote Originally Posted by Preston_08 View Post
    Where is the DV located at? Easy to find location?


    Sent from my iPhone using Tapatalk
    Here ya go
    K&N-Milltek HFC-Magnaflow Catback-APR snub mount-ER Sport FMIC-Forge TIP-Forge DV-Podi-034 Motor Mounts-034 Rear Sway/End Links-STaSIS Street Sport Coils-Bentley Manual

  14. #14
    Senior Member Two Rings Preston_08's Avatar
    Join Date
    Apr 14 2014
    AZ Member #
    187316
    My Garage
    1998 Chevrolet C1500
    Location
    Richlands, VA

    Fluttering sound after boost

    Quote Originally Posted by customa4 View Post
    Here ya go
    Awesome, gonna have to remove the whole front end....fun haha


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  15. #15
    Veteran Member Four Rings freeloader700's Avatar
    Join Date
    Mar 23 2012
    AZ Member #
    90479
    My Garage
    '03 A4 1.8TQM
    Location
    The Hills, OR

    No no no, you access it from underneath. Put the can on ramps, remove a couple of one time use clamps and its off. No need to remove the front end


    Sent from my finger tips using Tapatalk
    2003 A4 1.8TQM // Motoza // GTRS // 550cc // TR18T // Forge Splitter // 034 RSB & End Links // V710 Gunmetal 19x8.5

    →→FrankenTurbo F21 BUILD←←

  16. #16
    Veteran Member Four Rings daihashi's Avatar
    Join Date
    Apr 03 2010
    AZ Member #
    57104
    Location
    houston, tx

    Quote Originally Posted by freeloader700 View Post
    No no no, you access it from underneath. Put the can on ramps, remove a couple of one time use clamps and its off. No need to remove the front end


    Sent from my finger tips using Tapatalk
    you could also just slide the front carrier a bit forward to gain some room, and do it from up top. No need to actually remove it. I prefer this method... I never seem to have good luck trying to pop off clamps while on my back.

  17. #17
    Veteran Member Four Rings customa4's Avatar
    Join Date
    Apr 07 2011
    AZ Member #
    73592
    My Garage
    02 A4 1.8T CVT, 02 A4 1.8TQ 5spd, 92 Geo Prizm
    Location
    CT

    Quote Originally Posted by Preston_08 View Post
    Awesome, gonna have to remove the whole front end....fun haha


    Sent from my iPhone using Tapatalk
    I was just giving you a different view of the location.
    K&N-Milltek HFC-Magnaflow Catback-APR snub mount-ER Sport FMIC-Forge TIP-Forge DV-Podi-034 Motor Mounts-034 Rear Sway/End Links-STaSIS Street Sport Coils-Bentley Manual

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