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  1. #1
    Veteran Member Three Rings audipcanugo's Avatar
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    Oct 19 2005
    AZ Member #
    8434
    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    One last attempt....need (diagnostic gods here)

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    I have codes P0507, and P0171. I have replaced the air filter, removed and cleand the MAF. ( ALso I have tried running with the MAF unplugged and idle stays the same....horrible.) I cannot find a single torn hose and I have looked everywhere. The only air noise is coming from the pancake valve....which it is the small hole on it that releases air. Anyways I cleaned that as well. Also, every ten or fifteen seconds usually at my incredibly awesome dying idle...I get this humming sound from the front passenger side of the car (FRONT not REAR). I am at a loss here guys.

  2. #2
    Veteran Member Four Rings martini's Avatar
    Join Date
    Aug 10 2004
    AZ Member #
    3092
    My Garage
    2002 A4, 1.8TQM
    Location
    www.a4mods.com

    Re: One last attempt....need (diagnostic gods here)

    Quote Originally Posted by audipcanugo View Post
    I have codes P0507, and P0171. I have replaced the air filter, removed and cleand the MAF. ( ALso I have tried running with the MAF unplugged and idle stays the same....horrible.) I cannot find a single torn hose and I have looked everywhere. The only air noise is coming from the pancake valve....which it is the small hole on it that releases air. Anyways I cleaned that as well. Also, every ten or fifteen seconds usually at my incredibly awesome dying idle...I get this humming sound from the front passenger side of the car (FRONT not REAR). I am at a loss here guys.
    have you inspected your spark plugs and tested for pressure at the fuel rail?

    if you changed the air filter, unplugged the maf, and cant find any leaks - then it sounds like you have eliminated the air path (as long as your confident with your work thus far)... next are the fuel and spark paths..
    a4mods.com Stickers!


    http://www.a4mods.com <-- Thats my website!

    - My vehicle is stock.... I promise -
    - BetaAlphaTau member #4 -

  3. #3
    Veteran Member Three Rings audipcanugo's Avatar
    Join Date
    Oct 19 2005
    AZ Member #
    8434
    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    Re: One last attempt....need (diagnostic gods here)

    First off I don't have a VAG Com. What can I do without one...

  4. #4
    Veteran Member Three Rings eg6siR's Avatar
    Join Date
    Feb 06 2008
    AZ Member #
    24979
    My Garage
    1993 honda civic Si, 2004 Audi
    Location
    pittsburgh pistolvania

    Re: One last attempt....need (diagnostic gods here)

    the humming from the front of the car is Secondary air injection pump....

    p0507- idle air control system rpm higher than expected

    p0171- System Too Lean Bank 1



    take off the belly pan and in the front passenger corner there should be a little air pump, that is your secondary air injection pump and from what i know if there is a leak in that system you will get the loud squeal and from what all data says it can cause those codes... the secondary air injection pump was something to look at on both of those codes in the diagnostic tree... lemee know if that helps..
    snailspeed.net

    04 1.8t 6spd dolphin grey

    "you can go fast cheap but it wont be perfect, or you can build it right and go fast, but it wont be cheap"

  5. #5
    Veteran Member Four Rings B6Lovin's Avatar
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    Jun 29 2007
    AZ Member #
    19171
    My Garage
    2004 Audi A4 1.8TQM, 1989 Suzuki Sidekick TDI, 1995 VW Cabrio 12vT
    Location
    Raleigh, NC

    Re: One last attempt....need (diagnostic gods here)

    make a boost leak checker and make ABSOLUTELY SURE that there aren't any leaks in the hoses. martini had a bad one in a crank case breather hose that he never would have found otherwise. I also had one where there was a pinhole in a hose that ripped itself open under boost.

    best 5 bucks i ever spent was to make one.

    the reason i say to go back over the intake system one more time is because that sounds exactly like how my car acted when i blew an IC hose off. shitty idle - then stalling.
    GT3071R - 338awhp ... GT3076R - 361awhp
    12.5 best ET -- 113 best trap

    The Awesome™
    BetaAlphaTau Member #42

  6. #6
    Veteran Member Three Rings eg6siR's Avatar
    Join Date
    Feb 06 2008
    AZ Member #
    24979
    My Garage
    1993 honda civic Si, 2004 Audi
    Location
    pittsburgh pistolvania

    Re: One last attempt....need (diagnostic gods here)

    yea, do a boost leak check to but i'm willing to bet its the Secondary air injections system
    snailspeed.net

    04 1.8t 6spd dolphin grey

    "you can go fast cheap but it wont be perfect, or you can build it right and go fast, but it wont be cheap"

  7. #7
    Veteran Member Three Rings audipcanugo's Avatar
    Join Date
    Oct 19 2005
    AZ Member #
    8434
    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    Re: One last attempt....need (diagnostic gods here)

    Ok well How can I do that test without a vag? Also what Exactly will I be looking for with the secondary pump?

  8. #8
    Veteran Member Four Rings martini's Avatar
    Join Date
    Aug 10 2004
    AZ Member #
    3092
    My Garage
    2002 A4, 1.8TQM
    Location
    www.a4mods.com

    Re: One last attempt....need (diagnostic gods here)

    a4mods.com Stickers!


    http://www.a4mods.com <-- Thats my website!

    - My vehicle is stock.... I promise -
    - BetaAlphaTau member #4 -

  9. #9
    Veteran Member Four Rings dirtybrd's Avatar
    Join Date
    Mar 21 2006
    AZ Member #
    10955
    My Garage
    Revo Tuned 2.0L w/35r
    Location
    Lakeland, FL.

    Re: One last attempt....need (diagnostic gods here)

    I just had that 507 code come up on a GMC Canyon @ work. I cleaned the TB and all was well. Sounds to me like you have a dirty TB and or a bad MAF. Are you running a chipped ECU and if so which tuner?
    BetaAlphaTauMember#6

    I'm back bitches!

    35r and REVO...what?

  10. #10
    Veteran Member Three Rings audipcanugo's Avatar
    Join Date
    Oct 19 2005
    AZ Member #
    8434
    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    Re: One last attempt....need (diagnostic gods here)

    No I am not chipped....damn well should be but not. And the MAF I'm thinkin is ok...Dirty TB? Car is running very lean. That 507 code I got was sayin RPMS too high. But the damn thing is running very hesitant and the idle is low and sputtering. This has to be horrible for the motor but I told myself I'm not droppin 300 plus anymore on a diagnostic.

  11. #11
    Senior Member Three Rings AudiSeefu's Avatar
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    Sep 14 2006
    AZ Member #
    11312
    Location
    Fort Myers, FL

    Re: One last attempt....need (diagnostic gods here)

    hey man, I am in okc and have vag if you need. let me know.
    http://members.cox.net/audiche/maxfrontsigtemp.jpg

    -Che
    1998 Audi A4 2.8
    2002 Audi A4 1.8t

  12. #12
    Veteran Member Three Rings audipcanugo's Avatar
    Join Date
    Oct 19 2005
    AZ Member #
    8434
    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    Re: One last attempt....need (diagnostic gods here)

    Thanks I def. will..

  13. #13
    Veteran Member Four Rings old guy's Avatar
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    Dec 28 2006
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    14483
    My Garage
    '13 A5, '24 Tiguan SEL R-Line
    Location
    Western Maryland

    Re: One last attempt....need (diagnostic gods here)

    You really need to run a pressure test. A P0507 coupled with a P0171 is a very strong indication of a vacuum leak somewhere. The extra air will give you a rough and fluctuating idle and also lean out the mixture causing that combination of codes. It only takes a small leak at idle to cause problems.
    '03 A4 5-MT Motoza tuned Frankenturbo F21L With full supporting mods. Sold (and missed dearly).
    '13 A5 6-MT Needs more Fun Stuff: Neuspeed PM / 3.0 TDI Intercooler / H&R OE Sport Springs / Bilstein B8 Shocks / TyrolSport Brake Stiffeners / ECS Short Shifter / S5 Side Skirts / RS Grille

  14. #14
    Veteran Member Four Rings dirtybrd's Avatar
    Join Date
    Mar 21 2006
    AZ Member #
    10955
    My Garage
    Revo Tuned 2.0L w/35r
    Location
    Lakeland, FL.

    Re: One last attempt....need (diagnostic gods here)

    Still here huh?
    BetaAlphaTauMember#6

    I'm back bitches!

    35r and REVO...what?

  15. #15
    Veteran Member Four Rings old guy's Avatar
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    Dec 28 2006
    AZ Member #
    14483
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    '13 A5, '24 Tiguan SEL R-Line
    Location
    Western Maryland

    Re: One last attempt....need (diagnostic gods here)

    Quote Originally Posted by dirtybrd View Post
    Still here huh?
    Just checking in before I go to bed. (Old guys need a lot of sleep, plus 4:30am comes up awful quick!)
    '03 A4 5-MT Motoza tuned Frankenturbo F21L With full supporting mods. Sold (and missed dearly).
    '13 A5 6-MT Needs more Fun Stuff: Neuspeed PM / 3.0 TDI Intercooler / H&R OE Sport Springs / Bilstein B8 Shocks / TyrolSport Brake Stiffeners / ECS Short Shifter / S5 Side Skirts / RS Grille

  16. #16
    Veteran Member Three Rings eg6siR's Avatar
    Join Date
    Feb 06 2008
    AZ Member #
    24979
    My Garage
    1993 honda civic Si, 2004 Audi
    Location
    pittsburgh pistolvania

    Re: One last attempt....need (diagnostic gods here)

    so you dont suspect the secondary air injection pump for that squeal from the front of car at all old guy?
    snailspeed.net

    04 1.8t 6spd dolphin grey

    "you can go fast cheap but it wont be perfect, or you can build it right and go fast, but it wont be cheap"

  17. #17
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '13 A5, '24 Tiguan SEL R-Line
    Location
    Western Maryland

    Re: One last attempt....need (diagnostic gods here)

    Quote Originally Posted by eg6siR View Post
    so you dont suspect the secondary air injection pump for that squeal from the front of car at all old guy?
    audipcanugo never mentioned anything about a squeal . he stated that there was a humming sound from the right front. Possible a torn DV? The secondary air pump is only activated for the first 90 seconds of a cold start. I was under the impression that his problem was all the time, not just at start up. Plus the secondary air pump is not part of the intake system. It pumps air into the port on the back of the head to get more air into the CAT during a cold start.
    '03 A4 5-MT Motoza tuned Frankenturbo F21L With full supporting mods. Sold (and missed dearly).
    '13 A5 6-MT Needs more Fun Stuff: Neuspeed PM / 3.0 TDI Intercooler / H&R OE Sport Springs / Bilstein B8 Shocks / TyrolSport Brake Stiffeners / ECS Short Shifter / S5 Side Skirts / RS Grille

  18. #18
    Veteran Member Three Rings eg6siR's Avatar
    Join Date
    Feb 06 2008
    AZ Member #
    24979
    My Garage
    1993 honda civic Si, 2004 Audi
    Location
    pittsburgh pistolvania

    Re: One last attempt....need (diagnostic gods here)

    yea, you are right, must have misread it, my mind is in a million places right now, and i am working on an a6 with secondary air injection problem right now at work, must have got things a little fouled up in my head... now that i re-read his first post, i completely agree it could be a vacuum leak... wasnt trying to say you were wrong... you seem to be the goto guy around here on AZ... i have read a gazillion of your posts old guy...
    snailspeed.net

    04 1.8t 6spd dolphin grey

    "you can go fast cheap but it wont be perfect, or you can build it right and go fast, but it wont be cheap"

  19. #19
    Veteran Member Three Rings audipcanugo's Avatar
    Join Date
    Oct 19 2005
    AZ Member #
    8434
    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    Re: One last attempt....need (diagnostic gods here)

    Ok I am getting the PVC parts this morning to run the boost leak test. Will that find any leak I may have?

  20. #20
    Veteran Member Four Rings B6Lovin's Avatar
    Join Date
    Jun 29 2007
    AZ Member #
    19171
    My Garage
    2004 Audi A4 1.8TQM, 1989 Suzuki Sidekick TDI, 1995 VW Cabrio 12vT
    Location
    Raleigh, NC

    Re: One last attempt....need (diagnostic gods here)

    yeah, just follow the writeup on a4mods and you'll be fine -- i recommend using a really good PVC glue though and not JB weld. JB takes WAY too long to dry. (PVC glue takes about 10 seconds to get a good seal)
    GT3071R - 338awhp ... GT3076R - 361awhp
    12.5 best ET -- 113 best trap

    The Awesome™
    BetaAlphaTau Member #42

  21. #21
    Veteran Member Three Rings audipcanugo's Avatar
    Join Date
    Oct 19 2005
    AZ Member #
    8434
    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    Re: One last attempt....need (diagnostic gods here)

    Oh jesus....I'm screwed. The big hose that goes into the block and into the PCV valve. It had a slit in it so I have been trying to get it off. Now the whole top part that goes right into the PCV has torn almost off. What the hell am I gonna do?

  22. #22
    Veteran Member Three Rings audipcanugo's Avatar
    Join Date
    Oct 19 2005
    AZ Member #
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    My Garage
    2009 Audi A4 Premium - Sport package
    Location
    Baton Rouge, LA

    Re: One last attempt....need (diagnostic gods here)

    I have no idea how to even get the hose off. It runs under the engine.

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