DCT not Rev matching

Discussion in 'E90 Saloon / E92 Coupe / E93 Convertible M3 (2008-2013)' started by Johnny1987, May 16, 2018.

  1. 16 May 2018 at 6:57 PM #1
    Johnny1987

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    Hi Guys,

    After some advice if anyone can help. My car is a DCT and when im D3/S3 or anything below the car does not rev match anymore when gearing down manually and make that blipping sound. If i gear down the revs suddenly drop to 1500 and the car just feels really sluggish for like a second or two then it catches up to my gear change and then makes the sound! What is that about?

    Anything in D4/S4 and above it rev matches fine and acts as normal.

    No error codes or anything like that. I have noticed that the idle is quite rough and bouncy on cold start and when warmed up when at a standstill the revs seem to be resting lower then normal at around 600rpm.

    Please help !

    Johnny
     
  2. 16 May 2018 at 8:11 PM #2
    Theone8181

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    I thought DCT only rev matched in 4 and above?
     
  3. 16 May 2018 at 8:12 PM #3
    SUBA

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    Hey man, mine is the very same... Blips only in s4/5/6 d4/5

    Must be the way it’s designed :thumbsup:
     
  4. 16 May 2018 at 8:13 PM #4
    DJonmotors

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    Yep this is normal AFAIK. Mine does the same.

    DJ
     
  5. 16 May 2018 at 9:51 PM #5
    Johnny1987

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    That cant be right, in D3 & D2 when i use the paddle to manually gear down it usually rev matches and roars. E.g from 5th gear in Auto (D2 or D3) at like 2000-2500rpm if im approaching a traffic light and gear down very quickly through the gears (4th, 3rd, 2nd) it will blip and roar. This was the case on all 4 of my E92 M3’s including this one up until a few days ago
     
    Last edited: May 16, 2018
  6. 16 May 2018 at 10:18 PM #6
    Fooman

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    Mine seems to have the same problem since the weekend. Think I will have to check all the idrive settings incase something has changed
     
  7. 16 May 2018 at 10:28 PM #7
    5tuart

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    It only throttle-blips in higher gearbox settings, like S5.
     
  8. 16 May 2018 at 11:28 PM #8
    joeshaw123

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    It sounds like you’ve got it in D2/D3 (auto) and you click the paddles to downshift. This obviously puts it in manual mode - you’ve made sure you’re in S4 or S5 when you put it in manual? I always have mine set to D2 and S4 so the auto mode is nice and sedate but it still Rev matches when i manually downshift. They don’t rev match in s3 or lower.
     
  9. 17 May 2018 at 10:45 AM #9
    DS25

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    This...

    Sounds like you have your Manual setting in the idrive set too low... My manual setting is S5 and its ace.
     
  10. 17 May 2018 at 11:54 AM #10
    delboylee

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    Think that’s normal mate.

    For the first time, I drove around in auto the other day in D1 as I was desperately looking for petrol haha. I noticed it starts off in second gear rather than first!
     
  11. 17 May 2018 at 12:25 PM #11
    WinFreak

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    Snow mode :)
     
  12. 17 May 2018 at 12:32 PM #12
    kinglean

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    Mine is the same, only blips on the higher gearbox settings.
     
  13. 17 May 2018 at 1:39 PM #13
    delboylee

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    Clever :peace:You reckon it saves fuel too?
     
  14. 17 May 2018 at 1:46 PM #14
    WinFreak

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    Not sure, it'll be in a higher rev sooner but you might end up putting more throttle to get the thing going so I doubt you'd notice it
     

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