Acceleration lag, revs increase after putting foot down (DSG)

[irnbru]

Now been driving Scirocco for a few months and recently noticed intermittent problem.
Occasionally when i put the foot down that the revs increase a few thousand RPM and a significant (noticeable) lag before acceleration. e.g driving along at 60 in D6 gear, want to overtake, put the foot down revs can go to 4,000 or even 5,000 with no acceleration for a second or so. That's enough time for me to miss the slot i intended to move into so definitely a concern.

Took it in yesterday to VW, Garage reset the DSG, did a software update and advised it could be "learning my driving style" however I dont think the car was originally like this and i should not have to switch to S mode or use Paddles to overtake safely when driving normally.

Already today in testing D6, 60Kmph managed to hit 5000 rpm with no acceleration before backing off so i dont believe problem fixed.

I have seen many references in forums to DSG issues, interested to see recent experiences.

[DVSTwig]

foot flat, or down enough for it to kick down gears?

60 in 6th gear is always going to have some lag unless it drops a couple of gears.

[irnbru]

foot flat right to the point before it clicks. I would expect some lag however not for the revs to jump up to 4k/5k before it decides to do something.

[enzo15637]

foot flat right to the point before it clicks. I would expect some lag however not for the revs to jump up to 4k/5k before it decides to do something.

sounds similar to my scirocco, most of the time I use manual mode through the paddles when I want to overtake. after all d is very much setup for high mileage. it is kind of annoying wish there was a mode in between d-s mode

[Silvertfox]

Consider having the DSG software update. Very different to stock. Much more how I think it should work.


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[tigger73]

Consider having the DSG software update. Very different to stock. Much more how I think it should work.


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+1 this ^^^

I have DSG tune and agree that it's 100% how it should come from the factory in terms of driveability.

It really annoys me when vehicle manufacturers tune their cars to minimise emissions/fuel consumption at the expense of driveability.

VW is not the only brand that does this. It's all about optimising the car for some "artificial" lab style efficiency tests that results in short shifting gears and not allowing the gearbox to upshift when you really want it to when you put your foot down. Probably saves a few % in the cycle testing and lowers the "advertised" consumption by 0.1-0.2 l/100km.

What I believe is happening in your case is you put your boot in, the gearbox decides to shift down 2 cogs as a response. Due to the fact that this gear is on the same side of the DSG gearbox as the one you're currently in, there is around a 1 second delay until the gear gets slotted in. What the engine is doing is rev matching to the new gear before it lets out the clutch . Unfortunately you're waiting around for the little hamster in the gearbox to shift the cogs across until the other hamster can let the clutch out for you

This also can happen when the DSG decides to change gear to any other gear than it has "pre-selected" but is most likely going to happen when you are shifting 2 gears. It's a fact of how the gearbox works unfortunately. You'll also find this when shifting rapidly from Reverse to D that it takes a bit for 1st gear to engage. Again R and 1 are on the same side of the gearbox in the 6 speed DSG. Manual downshift will work better but again if you hit downshift twice in rapid succession you'll find a delay in the transmission getting the new gear engaged.

DSG tune resolves part of the hesitation issue in D where the brains of the car are madly trying to maintain fuel economy even when you have your foot planted. However it can't fix the problem with shifting 2 cogs which is inherent to the design of the gearbox. That's one of the situations where a manual is actually better.