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Slugglish A4 2.0 Turbo

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Brendan12, Jul 12, 2011.

  1. Brendan12
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    Brendan12 Member

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    [Jul 12, 2011]
    I've just bought an A4 2.0 Turbo the weekend.

    It's an 05 plate with 53,000. My problem is it feels very sluggish for a 2.0 turbo. I'm not sure whether its me been used to quicker cars, but it really doesn't feel like it even has a turbo!

    Another problem I have is that it makes a really loud rattling/tappety noise on idle. Really doesn't sound right too me.

    I've had it on VCDS with no faults showing.

    Is it me or could there be something wrong?
    #1
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  3. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 13, 2011]
    Check your DV. If thats blown, replace it, and then you'll feel the turbo. Even if its not blown, worth replacing to the newer metal style.

    If its still slow, remap.
    #2
  4. rowdyboy
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    rowdyboy Member

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    [Jul 13, 2011]
    The idling noise is a trait of that engine, there's quite a few threads on it. It's normal.
    #3
  5. Brendan12
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    Brendan12 Member

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    [Jul 13, 2011]
    Which metal style do I need to change it too? Will it be ok with a remap then?

    Ok thanks for the info
    #4
  6. Marrow
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    Marrow Member

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    [Jul 13, 2011]
    You need the revised OEM version "D" diverter valve. My diverter valve failed and the car was flat as hell.
    Remap will transform the car mate get it done stock 2.0T aint that quick could just be that depends what your used too?
    #5
  7. Brendan12
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    Brendan12 Member

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    [Jul 13, 2011]
    I took it out today and it seemed fine. I think it's just me.

    My previous car was an Audi A3 3.2 V6 and before that a Focus ST running 300bhp. That's probably why I think it's slow lol
    #6
  8. goon
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    goon Member

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    [Jul 14, 2011]
    my 2.0t feels slow too even after a remap,no fault codes to show anything wrong either,no hissing of boost leaks but no gauge to show boost,my old 1.8t was quicker and more economical its just that these cars are very smooth and efficient and dont feel fast,had a Focus 280 bhp last myself a totally different animal which was exciting and begged to be driven,that too was more economical.
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  9. Marrow
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    Marrow Member

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    [Jul 14, 2011]
    No a remapped 2.0t should feel fast mine sure does and I have owned various quick cars ! I would check MAF and DV if I were you ?
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  10. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 14, 2011]
    Yeah I've owned a 3.2 A6 and a 3.2 A4 and the remapped 2.0T feels faster than both of those. It should be faster as well in theory, as the 2.0T is lighter, and has just as much or maybe a few more BHP than a 3.2. You will get the turbo lag, but if your in sport mode you will not notice any.

    My advice, get the revision D DV, get a remap. Then you should be happy. If not, then look into a K04.
    #9
  11. goon
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    goon Member

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    [Jul 14, 2011]
    my apr mapped 2.0t quattro accelerates like this,30-50 (3rd) 4.48,50-70 (4th) 6.2,60-80 (5th) an agonising 12.3
    #10
  12. mikeyw
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    mikeyw Member

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    [Jul 14, 2011]
    Well 60-80 should be 3rd really. Never really timed mine so I can't compare. It's an odd thing to try explain, but mine feels as fast as it should. It's a bit quicker than my old type-r, but much more torquey.
    Last edited: Jul 14, 2011
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  13. solaris
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    solaris Member

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    [Jul 15, 2011]
    #12
  14. Brendan12
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    Brendan12 Member

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    [Jul 17, 2011]
    Cheers. I think my engine code is BPB which isn't covered there. Will double check though.
    #13
  15. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 17, 2011]
    My engine code is BGB, not listed there, and it fitted no problems.

    Give Audi a call, give them your chassis number and ask them to check what DV will fit. If they come back saying revision B, then it will definately fit as its the same design. They should tell you to order a revision D as its the updated version and the B is obsolete.
    #14
  16. Brendan12
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    Brendan12 Member

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    [Jul 21, 2011]
    After going out in my mates MKV Golf GTi which is standard, I now believe there is definately something wrong with my car.

    The Golf pulled well in all gears, had bags of power everywhere. My A4 seems so guttless in comparison.
    #15
  17. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 21, 2011]
    Get your codes read, and go from there.
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  18. OxfordRich
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    OxfordRich Collecting Rings

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    [Jul 21, 2011]
    ....are you entitled to new coil packs under the "recall" that isn't a recall? I was and it feels better still after those.. more MPG i'm certain (long journeys, 2100 miles a month, plenty of time for comparison!)
    #17
  19. Brendan12
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    Brendan12 Member

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    [Jul 21, 2011]
    Ive checked them and there aren't any.

    Yeah it's there getting them done as we speak.
    #18
  20. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 22, 2011]
    Did you check for codes using VAG COM or a portable codes scanner?
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  21. Brendan12
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    Brendan12 Member

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    [Jul 22, 2011]
    Yeah and it didn't show anything which is why I'm confused. There is definately a problem, it's not just me now. When my old A3 went in for coil packs, I had an A3 2.0 TFSI as a courtesy car and again it was a totally different animal.
    #20
  22. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 22, 2011]
    Hmm.... well thats got me stumped then. Might be worth taking it to a VAG specialist and seeing what they say.
    #21
  23. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 22, 2011]
    Are you sure its a turbo? Audi made a 2.0FSI non turbo. I'm sure your correct, but it was the only thing I can think of.
    #22
  24. Brendan12
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    Brendan12 Member

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    [Jul 22, 2011]
    Yeah and me. I took the Audi technician out in it today and even he agreed it was down on power quite a bit.
    #23
  25. Brendan12
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    Brendan12 Member

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    [Jul 22, 2011]
    Well the turbo under the bonnet gives it away slightly lol
    #24
  26. Brendan12
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    Brendan12 Member

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    [Jul 24, 2011]
    Just scanned my car with VCDS:


    1 Fault Found:
    000665 - Boost Pressure Regulation: Control Range Not Reached
    P0299 - 002 - Lower Limit Exceeded
    Freeze Frame:
    Fault Status: 01100010
    Fault Priority: 0
    Fault Frequency: 1
    Mileage: 85458 km
    Time Indication: 0

    Freeze Frame:
    RPM: 4631 /min
    Load: 77.2 %
    Speed: 104.0 km/h
    Temperature: 79.0°C
    Temperature: 25.0°C
    Absolute Pres.: 1000.0 mbar
    Voltage: 13.843 V


    Any ideas?
    Last edited: Jul 24, 2011
    #25
  27. mikeyw
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    mikeyw Member

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    [Jul 24, 2011]
    Low boost pressure is what it sounds like then. Leak, faulty sensor or turbo?
    #26
  28. Sam W
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    Sam W Member

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    [Jul 24, 2011]
    I'm not sure what value it should be exactly, but 1000mbar sounds a bit low, that would be atmospheric pressure. From that I'd definutely say you've got a boost leak somewhere :(
    #27
  29. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 24, 2011]
    Almost exactly the same as I got before I changed my DV....

    1 Fault Found:
    000665 - Boost Pressure Regulation: Control Range Not Reached
    P0299 - 002 - Lower Limit Exceeded
    Freeze Frame:
    Fault Status: 01100010
    Fault Priority: 0
    Fault Frequency: 1
    Mileage: 125556 km
    Time Indication: 0
    Freeze Frame:
    RPM: 4437 /min
    Load: 91.3 %
    Speed: 48.0 km/h
    Temperature: 84.0°C
    Temperature: 35.0°C
    Absolute Pres.: 1010.0 mbar
    Voltage: 13.589 V


    So it is your DV. Spend £50, and about an hour and it'll be fixed.
    #28
  30. Brendan12
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    Brendan12 Member

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    [Jul 24, 2011]
    Thanks, that was on my list of things to do. I'll get that ordered anyway. Would I not hear it fluttering if my diverter valve was broken?
    #29
  31. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Jul 24, 2011]
    No you won't hear anything. The holes are really quite small, but seem to let all the air out! You might hear a little bit more woosh when you upgrade.
    #30
  32. Brendan12
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    Brendan12 Member

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    [Jul 25, 2011]
    Thanks I'll get one ordered!
    #31
  33. Brendan12
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    Brendan12 Member

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    [Aug 23, 2011]
    Little Update:

    I bought a Revision D Diverter valve and fitted it the weekend. Now I have full boost! I knew the car wasn't right and the valve I had on the car was Revision B and had a huge split in it!

    Thanks for all the advice!
    #32
  34. ChrisFurlong
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    ChrisFurlong Avantageous

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    [Aug 23, 2011]
    Knew that would be the problem, its amazing the difference that little thing makes isn't it. Glad your sorted.
    #33
  35. Brendan12
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    Brendan12 Member

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    [Aug 23, 2011]
    Yep made a massive difference. A lot happier with the car now! Thanks!
    #34
  36. audicruiser
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    audicruiser Audi Heaven

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    [Aug 24, 2011]
    I changed mine to Rev D last month. I had Rev C on mine and though it hadn't split, I changed it as I have had it remapped. Remapped 2.0T is how they should be from the factory, well worth looking into... :icon_thumright:
    #35
  37. Brendan12
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    Brendan12 Member

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    [Aug 25, 2011]
    Yeah I will be getting it done soon!
    #36
  38. Geeba
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    Geeba New Member

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    [Sep 7, 2011]
    Hmmm this is interesting!! - whats the chances of my 06 having the piston type already? - I've had it re-mapped but the power doesnt seem smooth or consistent, is this mod a no brainer, ie do it anyway type thing?
    #37
  39. chrisa4quat
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    chrisa4quat Member

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    [Sep 7, 2011]
    The fault codes definitely relate to the DV. says on the test plan check as diaphragm is most likely split. i am thinking of changing mine as i have fitted the forge spacer and it doesn't seem to perform as it should.
    #38
  40. Brendan12
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    Brendan12 Member

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    [Sep 7, 2011]
    Yeah I changed it to the revision D part and now it is back to how it should be
    #39
  41. Geeba
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    Geeba New Member

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    [Sep 7, 2011]
    Could anyone give me an idea where and what to look for? - my 18T was easy it was smack bang on top of the engine... I had a quick look lunchtime but I cant see it... :S
    #40

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