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Thread: Help!

  1. #1
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    Help!

    Hi all...havent posted in a while because for the most part, Thing 1 and Thing 2 have been behaving. In Seattle and on to other adventures. Thing 2 just developed a power loss when making power. Just shuts off 😕. Sometimes goes to limp mode. Engine codes are 18393,18308,17963,16502,17983,17953. None seem to be a direct correlation. Any ideas?? Thanks in advance

  2. #2
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    17963 is a direct correlation.
    2 last ones are also very weird (throttle control malfunction?).

  3. #3
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    Ur hitting boost cut. This will tell why

    Reset ecu by battery cable

    restart

    test drive data log 3,31,115

    3rd gear pull in turbo mode 3000 to redline

    report log

  4. #4
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    Unfortunately, I don't have the tools to log...cleared all codes, started over, ran it till it went to limp mode.........these are the only codes 17983 engine mount short to +, 18393 Coolant control module, 17953 Throttle valve controller malfunction.

    The 17953 code seems to be the most logical. Vag com says this can be caused by restricted airflow. Took the filters out and they were filthy. Thought I had found the problem. Unfortunately a quick trip around the block without the filter found I still have the problem although it makes ALOT more power before it shuts off. Weird.

    As an aside, when I turn right from a stop and accelerate, it won't even get to 2000 rpm before it dies. When I turn left, it will run to 3500-4000 before it quits.

    So confused...thanks for the help. Wish I could log it Dave.

  5. #5
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    Check N75 lines (both: reference from the driver's side turbo, and control - going from N75 to actuator cans). If they have any leaks (cracks, etc) - it will cause boost overshoot. The short "dump" line can be ignored.
    N75 is a brown colored 3-nipple boost control solenoid mounted on the rear of your engine below the airbox.

  6. #6
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    Thanks, Ill look at those when I get back to Minnesota. Ordered a cable and Vag 409.1 hopefully this will allow me to look at more parameters than VCDS lite? Maybe do a throttle adaptation? Gotta love Amazon....sitting in Fargo, Vag 4091. and cable delivered today to Seattle. Pick it up and try it on the car in Minnesota Monday....hopefully it will provide some enlightenment.

  7. #7
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    Owning a 14yr old RS6 can be pure bliss or Hotel California

    not it having a full blown vag-com is like running across a frozen pond holding knives in your hands

    i have a backup vag for my main vag.

    I agree with the n75 lines but seeing the log will help a great deal
    Last edited by DHall1; December 2nd, 2017 at 21:39.

  8. #8
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    Lol....I'm just trying to keep both of them on life support for as long as possible...ever since giving up the 3 car garage for one parking space in Seattle. I love this car and so does my wife, but she drove a P100D and went...yea.....and then I watch one absolutely destroy me...I know what is coming, just don't want to admit it yet.

  9. #9
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    See if this works ...never logged before...straight to limp mode...thanks all...esp Dave for any insight

    Group A: '003 Group B: '031 Group C: '115
    Engine Speed Mass Air Flow Throttle Valve Angle Ignition Lambda Control Lambda Control Lambda Control Lambda Control Engine Speed Engine Load Boost Pressure
    TIME (G28) (G70 + G246) Timing Angle TIME Bank 1 (actual) Bank 1 (specified) Bank 2 (actual) Bank 2 (specified) TIME (G28) (specified)
    Marker STAMP /min g/s % °BTDC STAMP V V V V STAMP /min % mbar Marker
    0.48 680 8 2.7 8.3 0.01 0.15 0.615 0.08 0.505 0.25 680 26.3 980
    1.21 680 8 2.7 6.8 0.72 0.71 0.63 0.665 0.105 0.96 680 26.3 980
    1.92 760 17.19 6.3 18.8 1.44 0.11 0.655 0.665 0.185 1.68 680 25.6 980
    2.63 1400 24.11 9 28.5 2.16 0.78 0.635 0.74 0.08 2.4 1200 42.1 980
    3.34 1680 36.89 12.9 29.3 2.86 0.7 0.725 0.715 0.715 3.1 1480 44.4 980
    4.06 1960 49.17 15.3 30 3.58 0.25 0.7 0.72 0.7 3.82 1800 48.9 980
    4.78 2040 61.19 18 30 4.3 0.74 0.72 0.79 0.77 4.54 2040 63.2 980
    5.49 2320 75.53 20.4 30.8 5.02 0.73 0.235 0.71 0.295 5.24 2200 66.9 1090
    6.21 2600 90.75 21.6 21 5.73 0.675 0.7 0.775 0.75 5.98 2520 75.2 1080
    6.92 3040 140.64 24.3 21 6.44 0.105 0.53 0.715 0.7 6.68 2920 96.2 1370
    7.64 2440 16.31 5.9 39.8 7.16 0.84 0.85 0.86 0.885 7.4 2600 21.8 980
    8.37 1840 15.86 5.9 6.8 7.88 0.005 0.805 0.01 0.045 8.12 2120 17.3 980
    9.06 1480 16.31 5.9 31.5 8.6 0 0.005 0 0.005 8.84 1440 23.3 980

  10. #10
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    Clear DTCs before starting the log. And try enabling "turbo" mode for the VCDS, otherwise sample rate is too low to be meaningful.
    Was this WOT?

  11. #11
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    Try again. See my steps

    Quote Originally Posted by DHall1 View Post
    Ur hitting boost cut. This will tell why

    Reset ecu by battery cable

    restart

    test drive data log 3,31,115

    3rd gear pull in turbo mode 3000 to redline

    report log

  12. #12
    Registered User Bigglezworth's Avatar
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    Quote Originally Posted by 905084 View Post
    Lol....I'm just trying to keep both of them on life support for as long as possible...ever since giving up the 3 car garage for one parking space in Seattle. I love this car and so does my wife, but she drove a P100D and went...yea.....and then I watch one absolutely destroy me...I know what is coming, just don't want to admit it yet.
    Unfair comparison. 15yr old technology against Rollsroyce electric technology that costs TEN (10) times as much.... I will enjoy performance that is only 1 sec slower to 60 for a LOT less thank you. lol
    '02 S6 Avant Silver - Pokey | Carbon Black/Ebony RS6 w/ stuff - darn quick | '03 Daytona Grey/Ebony RS6 w/ more stuff - quicker yet | '91 NSX CDN issue with 6spd & BBSC - quicker yet and then some | '87 Buick GNX OEM clone w/ lots of stuff - quickest hands down

  13. #13
    Registered User lswing's Avatar
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    The Tesla's are nice, but here's a great review from Chris Harris. I've sat in one and they do feel a bit sparse and cheap inside, more like a $50k interior. I'd be tempted by one if I had a long stop light heavy commute, but overall the silence and what feels to be more of a bland car has been turning me off of them more these days. His review of how the braking messes with performance driving, along with the suspension is great input. Of course the 0-60 is amazing, but a tuned RS7 wouldn't be too far behind. Besides, the Tesla slows down at 150mph anyhow

    Ace/Edge TC - Tozo Trans - MTM TCU - REVO/ME7 tune - Wagner IC's w/ Venair Hoses - Aux Radiator delete - Hotchkis Sways - Hawk HPS Pads - Koni Sport Struts - Scroll KO4 Turbos - Devil's Own WM - 421whp/452wtq on Mustang Dyno - http://www.audirssix.com

  14. #14
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    Screw Tesla

    give me my raw V8 power and throw some turbos in for good measure.

    Audi new generation has lost it for me and my daily is my Porsche. Never thought I would say that.

    But another long time multi RS6 owner has recently jumped ship for a new Porsche Panamera turbo.

    Dont worry. Audi will sell plenty of the crap boxes A3, Q5s to water down the brand and make it insignificant

  15. #15
    Registered User Aronis's Avatar
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    What no love for the S8 Plus????

    New RS5 looks very interesting! 450/443 from V6. LOL.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

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