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Thread: Nobody cant find what is wrong with my A4 1.8TQ B6

  1. #1
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    Unhappy Nobody cant find what is wrong with my A4 1.8TQ B6

    I am having a bunch of troubles with my B6 1.8TQ and my trusted mechanic said he can't do anything about it... Looking for ideas before I start pouring more money into it...

    Symptoms
    1. Difficult to start. It cranks but it may take 5-10 cranks before the engine starts
    2. Idle is not smooth... Its not rough, but it is not smooth either
    3. Lack of power. The car does not run like it use to. E.g. For a steep upward slope that I used to drive with second gear, I now need to put the 1st gear, or the engine is on the brink of stalling.

    Codes
    17987 - Throttle Actuator: Adaptation Not Started
    16725 - Camshaft Position Sensor: Implausible Signal

    What has been checked/ tried
    1. The mechanic has triple checked that the car is properly timed. The 16725 does not go away. Problems remain
    2. We have tried two other camshaft position sensors. The 16725 does not go away. Problems remain
    3. We have checked the wiring to the camshaft sensor. They are ok.
    4. It is impossible to adjust the throttle body. Tried with the official audi diagnostic software (that is what they've told me. The dealer's electrician mechanic visited my mechanic.)
    5. Replaced the throttle body. The 17987 does not go away. Problem remains.
    6. Wiring to the throttle body also seems ok.
    7. Fuel filter is brand new.
    8. MAF sensor is clean
    9. Fuel pump's pressure tested and it seems ok.
    10. New coils and spark plugs are installed.
    11. Cooling system works perfectly.
    12. Checked the relays in the ECU compartment
    13. Checked all fuses.
    14. Battery is charged and in good health


    What is yet to be explored
    1. Some wires that go to the coils seems corroded... In the next round I will replace/ repair the harness that goes to the coils.
    2. Could it be an ECU problem?
    3. Replace fuel pump, just to be sure that it not sticking

    If you have any ideas, please reply...
    Thanks

  2. #2
    Verified VCDS User PetrolDave's Avatar
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    It would make it a lot easier suggest things to investigate if you post a full unedited VCDS Auto-scan.

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  4. #3
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    I don't own vcds... The codes were pulled from a another scanner

  5. #4
    Verified VCDS User PetrolDave's Avatar
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    Quote Originally Posted by romfeo View Post
    I don't own vcds... The codes were pulled from a another scanner
    Since this forum exists to help VCDS owners that may be a problem ...

    Have you tried asking on Audi owners forums? They will have knowledge specific to your B6 A4 which may be helpful.

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  7. #5
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    Well the category of the forum I have posted in, is for cases where vcds isn't available at all...

  8. #6
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by romfeo View Post
    Well the category of the forum I have posted in, is for cases where vcds isn't available at all...
    Not really. It's not for cases where VCDS isn't available. It's for cases where VCDS isn't applicable.

    This forum exists for VCDS users.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  9. #7
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    Quote Originally Posted by Uwe View Post
    Not really. It's not for cases where VCDS isn't available. It's for cases where VCDS isn't applicable.

    This forum exists for VCDS users.

    -Uwe-
    Looks like I misunderstand then... Go ahead and remove this thread, if it is against the forum rules...

  10. #8
    NostraJackAss Jack@European_Parts's Avatar
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    Did you consider getting a VCDS system and an RTFB to trace the WD while making use of advanced VCDS blocks, "once procured" & to check the G40 or shared circuits with a decade box?

    Been here:

    http://wiki.ross-tech.com/wiki/index...5/P0341/000833

    http://wiki.ross-tech.com/wiki/index...7/P1579/005497

    JPPSG is free no?.........

    https://forums.ross-tech.com/showthr...uot-JPPSG-quot

    Isn't RTFB is here?.....

    http://wiki.ross-tech.com/wiki/index...ir_Information

    Ever play load lights?



    When you get your authorized VCDS comporting system, please post the scan as instructed in this video below, okay?






    Since no one else can figure it out, I strongly encourage you to get a VCDS system and engage us, so we can help you join the collective, with a solution which is most likely!
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

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