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Post Revo possible DV probs

Discussion in 'A3/S3 Forum (8L Chassis)' started by imported_gek, Apr 5, 2005.

  1. imported_gek
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    imported_gek Guest

    [Apr 5, 2005]
    Hi guys, I am pretty sure my DV is pooped, but can one of you kind people just confirm that my suspisions are correct.

    Got Revo yesterday and now under hard acceleration I can hear a rapid clicky noise.

    If I advance the timing for Optimax via the SPS3 the click is even more pronounced. Revert back to stock and I can't hear it.
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  3. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 5, 2005]
    Doesn't sound like your DV mate. If it was then you would still get the fluttering noise when running standard map. You could always take it off and give it a quick inspection?
    #2
  4. Stormcatcher
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    Stormcatcher Member

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    [Apr 5, 2005]
    Any posts on here how to remove a DV valve?
    #3
  5. imported_gek
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    imported_gek Guest

    [Apr 5, 2005]
    Could it be a boost leak from a hose causing the noise? Are they usually audible from within the car?
    Can I reuse the clips on the DV or will I need to get some new ones if I remove it?
    Sorry for all the questions!
    #4
  6. nervus
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    nervus Well-Known Member

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    [Apr 5, 2005]
    sounds like the wastegate is knackered mate, if its a clicking, chattering sound, but could also be a number of things.

    My wastegate failed @ 8k miles also.
    #5
  7. imported_gek
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    imported_gek Guest

    [Apr 5, 2005]
    Great /ubbthreads/images/graemlins/mad.gif
    The car is still under warranty, but unless I can reproduce the problem with the car at stock, there's no way I can get things fixed.

    If it is the wastegate, am I causing damage driving it?
    #6
  8. nervus
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    nervus Well-Known Member

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    [Apr 5, 2005]
    No, it will just boost irraticaly. Does it not happen all the time? Might not be the wastegate actuator sticking. See if the arm moves freely.

    They are intergrated with the turbo so its a whole new unit im affraid if it the wastegate actuator.

    I suggest you dont take it to the dealers REVO'd though.

    Just let it develop so it does it more frequently.
    #7
  9. imported_gek
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    imported_gek Guest

    [Apr 5, 2005]
    When you say it will boost irratically, do you mean while accerelating, as that seems smooth?

    Few more findings:

    I get no noise when I take my foot off the accelerator, only while accelerating.

    It only becomes audible at about 4500 rpm+ in all gears.

    There is no power drop off while the noise is audible.

    When in standard performance mode it sounds more like a whooshing noise, when timing advanced for Optimax, more of a clicking.
    #8
  10. nervus
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    nervus Well-Known Member

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    [Apr 5, 2005]
    hmmmm, i dont know now. When i saw irraticaly, i mean sometimes it will boost like it should sometimes not as much and other times too much.

    Thats what mine was like, but it kept over boosting and blew the IC hoses off.

    If its still charging when making the noise, id get it looked at sharpish mate, it could be doing damage.
    #9
  11. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 5, 2005]
    Do you know how much boost its pushing out? Do you have a boost gauge or vagcom?
    #10
  12. imported_gek
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    imported_gek Guest

    [Apr 5, 2005]
    [ QUOTE ]
    Do you know how much boost its pushing out? Do you have a boost gauge or vagcom?

    [/ QUOTE ]

    I have vag com mate, do you know which blocks I need to log?

    Thanks for all the help on this btw guys.
    #11
  13. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 5, 2005]
    Yes you need to measure block 115. Log it to a file and post the results when you get them.
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  14. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 5, 2005]
    Some more info about block 115 (Courtesy of Wak's Website /ubbthreads/images/graemlins/grin.gif)

    115 - command boost and intercooler boost pressure -
    Block 115 will show you a reading in the 3rd and 4th column, requested boost and actual boost in millibars (1000 mbar = 1 bar). You will have to subtract about 1000mbar from both columns since atmospheric pressure is around that level. What is left is the boost request (boost that the ECU wants to "see" in the intake manifold) and actual boost (actual boost pressure at the intake manifold). The ECU controls the turbo wastegate and will modulate it to get actual boost as close to requested boost (following the rev/load map of the chip) as possible. Under sustained full throttle, actual boost should not deviate more than 100millibar from requested boost. If it does, then something is wrong. It is normal to have larger differences in these two numbers under shifting and under throttle application/de-application as it takes some time for the wastegate to react to commands. However, under sustained full throttle, assuming the road gradient doesn't change much, the two numbers should be very close to each other. The closer, the better.
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  15. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 5, 2005]
    Also remember that you can only record upto 1.54 bar so if it flatlines around this value then you will probably be boosting higher,
    #14
  16. imported_gek
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    imported_gek Guest

    [Apr 5, 2005]
    Thanks Dicky, I'll do this on the way home tonight.
    #15
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    Guest

    [Apr 6, 2005]
    i have the same clicky problem with my A3Tq actually...and it does seem to boost harder than others sometimes, although admittedly it does SEEM to be dependant on temps.

    I generally only notice the noise when setting off from cold, its a clicking that increases frequency with revs.

    Never noticed any problems really though, im getting it AMD chipped on thursday and rollered so that should show up any boost discrepancies etc on the "before" torque curve.

    I'll post up with my findings later on. I thought it might be normal though (the clicking) i read that it is the charcoal filter or something behind the headlight?



    To be honest at the moment i think my varying boost issue is due to crappy stock dump valve, and the clicking is charcoal filter and nothing to worry about.

    If i find out otherwise ill let you know though. And if anyone more technically competent than me here knows that im wrong in thinking its the charcoal filter, please point out as i dont want the car going bang!

    cheers
    #16
  18. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 6, 2005]
    [ QUOTE ]
    Thanks Dicky, I'll do this on the way home tonight.

    [/ QUOTE ]

    Did you log the results gek?
    #17
  19. imported_gek
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    imported_gek Guest

    [Apr 6, 2005]
    Right, I think I may have been out with my original diagnosis!

    The noise is not a clicking, it's like a whistle noise, but less high pitched than the turbo. I can hear both the turbo and this other whistle at the same time. To be honest, it sounds like a strong wind through the trees kind of whistle!!

    It does not do it in 1st or 2nd gear.

    It only does it between 2500 and 4000 revs (sound drops off after 4000), in 3rd and up.

    It only does it if I floor it in 3rd or above with the revs around 2500 ie put the engine under a bit of load.

    If I do a quick dash through all the gears there is no noise.

    I reverted the map back to stock this morning, and I can't hear it at all.

    Unfortunately I have no ftp access at work so I can't upload my log so here's a snippit:

    260.22 3200 70.7 1020 1340
    260.52 3200 75.9 1080 1340
    260.83 3200 77.4 1130 1340
    261.13 3240 78.9 1150 1350
    261.43 3240 82 1150 1350
    261.73 3240 89.5 1530 1340
    262.03 3280 133.8 2400 1580
    262.33 3320 178.9 2400 2070
    262.64 3360 191.7 2410 2510
    262.94 3400 191.7 2420 2510
    263.24 3440 191.7 2430 2420
    263.54 3480 191.7 2430 2450
    263.84 3520 191.7 2440 2450
    264.14 3560 191.7 2430 2440
    264.45 3600 191.7 2430 2440
    264.75 3640 191.7 2440 2440
    265.05 3680 191.7 2430 2430
    265.35 3720 191.7 2430 2450
    265.65 3760 191.7 2430 2410
    265.95 3800 191.7 2430 2440
    266.26 3840 191.7 2430 2440
    266.56 3880 191.7 2430 2430
    266.86 3920 191.7 2430 2420
    267.16 3920 191.7 2430 2420
    267.46 3960 172.9 1980 2250
    267.76 3960 130.8 1150 1730
    268.07 3960 37.6 1000 1490
    268.37 3920 13.5 1000 1240
    268.67 3920 12.8 1000 1140

    And here are my current fault codes:

    VAG-COM Version: Release 311.2-N


    Chassis Type: 8L - Audi A3/S3
    Scan: 01,02,03,08,15,17,22,35,37,45,54,55,56

    Address 01 -------------------------------------------------------
    Controller: 8N0 906 018 J
    Component: 1.8L R4/5VT 0003
    Coding: 10710
    Shop #: WSC 80177
    WAUZZZ8L921001285 AUZ7Z0A1869437
    1 Fault Found:
    18010 - Power Supply Terminal 30: Voltage too Low
    P1602 - 35-10 - - - Intermittent
    Readiness: 0000 0000

    Address 08 -------------------------------------------------------
    Controller: 8L0 820 043 H
    Component: A3 KLIMAAUTOMAT 0105
    Coding: 00041
    Shop #: WSC 01236
    1 Fault Found:
    00792 - A/C Pressure Switch (F129)
    31-00 - Open or Short to Ground

    Address 17 -------------------------------------------------------
    Controller: 8L0 920 980 R
    Component: KOMBI+WEGFAHRS. VDO D07
    Coding: 01444
    Shop #: WSC 00306
    WAUZZZ8L921001285 AUZ7Z0A1869437
    1 Fault Found:
    01314 - Engine Control Module
    49-10 - No Communications - Intermittent

    Address 22 -------------------------------------------------------
    Controller: 02D 900 554 B
    Component: HALDEX LSC ECC 0006
    1 Fault Found:
    01314 - Engine Control Module
    49-10 - No Communications - Intermittent

    End -------------------------------------------------------

    Sorry this is so long!!!!
    #18
  20. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 6, 2005]
    About this whistling noise you describe as "strong wind through the trees", Its not like a sucking sound is it?

    1.8t's do this when they have been remapped and is completely normal. You don't notice it so much in first and second but as you say, if you are in 3rd/4th/5th etc and boot it when the engine is under load then you will hear this noise clearly. Is this what you are describing?

    You threw me a bit when you said clicking but hopefully you are just talking about the above.

    By the way your boost looks ok to me.

    Rich.
    #19
  21. dickys3
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    dickys3 Moderator Staff Member Moderator

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    [Apr 6, 2005]
    Also

    Have you cleared the fault codes? It may be worth clearing them and checking them again in a couple of days to see if they re-appear. They may have been stored there for some time?

    Hope this helps
    Rich.
    #20
  22. imported_gek
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    imported_gek Guest

    [Apr 6, 2005]
    Yes, it could easily be a sucking sound (feel a bit foolish now!)

    That's great Rich, very appreciative of the help!

    As for the codes, I checked them about 5 weeks ago and they were clear. I'll reset them today and see if they come back.

    Thanks again.

    George
    #21
  23. nervus
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    nervus Well-Known Member

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    [Apr 6, 2005]
    Sorry, i thought when you said it was clicking it could have been the Wastegate actuator chattering as thats the symptoms mine had - hopefully its all normal mate!
    #22
  24. imported_gek
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    imported_gek Guest

    [Apr 6, 2005]
    Yea, sorry about that Nervus. After I had a proper listen last night, it was definitely not a click.
    Thanks for your help though.
    #23

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