"Slap in the back of the head" take off issues.

[MelbMan]

Yes my wife's 90 TSI DSG spends very little time in 1 when you take off, a split second and it's in 2. With the stop start we generally turn this off. It's novel the silence in traffic. But might reserve that silence for the day we get a hybrid Golf. The whirr of the starter motor while not loud (BMWs etc are the same) is a bit mechanical for my taste.

[lambertia]

Mk7 103Tsi - I had on occasion felt the car jerk as described. Now I give it a few seconds for the engine to come close to idle after each start/stop event before easing on the accelerator. No more jerking; but it does take a little patience. It seems to me from what I have read here that some of the cars here takes longer than others engage the drive train.

I've been wondering recently if it's not an issue with a drive train but instead an issue with the auto hold releasing the brake. I often get a delay with the release. I could imagine that if the car is in gear and fighting the brakes that the sudden jerk would occur when the brakes release.

[Kesh]

I've been wondering recently if it's not an issue with a drive train but instead an issue with the auto hold releasing the brake. I often get a delay with the release. I could imagine that if the car is in gear and fighting the brakes that the sudden jerk would occur when the brakes release.

That's what I believe it is. It's because when the engine starts, the RPM's rise higher than normal, so it might want to settle down first before taking off etc. I find if you don't modulate the accelerator at all when you take off, it's always smooth. Naturally you'll find that you press softer then harder, or harder than softer. Once the lights go green, if you push the accelerator and keep it at that position until the clutch is fully engaged, there shouldn't be any issue. As with the DSG, it does take practice!

[agentthumb]

Started noticing this with the TSI.

It never happens when the engine is switched off by Auto Stop Start. Happens when I come to a stop by applying minimal brake pressure leaving the engine running (Auto stop start doesn't stop the engine in this case). Auto-Hold is holding the car after this.

When I gently accelerate off the line in slow moving traffic, the rev goes up slightly from idle to about 1100rpm, but then suddenly shoot up to 1200 - 1300 rpm when the brake is released by Auto-Hold, lurching the whole car forward. Again, this doesn't happen every time, just some times.

Is anyone else still experiencing this? Any solutions?

[Jimi]

I believe the auto hold grips harder the harder you apply the brake when you come to a stop (I think it maintains your braking pressure when the car stops). I now subconsciously reduce pressure on the brake to almost nothing just before the car completely stops, meaning the auto hold is engaged but only very lightly, meaning less jerk when I move away

[agentthumb]

I believe the auto hold grips harder the harder you apply the brake when you come to a stop (I think it maintains your braking pressure when the car stops). I now subconsciously reduce pressure on the brake to almost nothing just before the car completely stops, meaning the auto hold is engaged but only very lightly, meaning less jerk when I move away

Hmm, interesting. I'll have to experiment with this a bit. Perhaps this is why it only happens sometime, and not others.

[agentthumb]

So, been driving around with A/C on as it's been fairly hot in Brisbane 30+ degrees. Noticed that this "slap in the head" issue disappears when the A/C is on 100% of the time. But when you turn the AC off, it comes back.

I have been driving with Stop Start and Auto Hold ON. With AC on, no issues. Turn AC off, jerky take off ensue. Bit strange...


Just to clarify, I have observed under these conditions (Auto hold and Stop Start on all the time):

AC On:

Engine stop -> take off = Fine.

Engine running -> take off = Fine.



AC Off:

Engine stop -> take off = Fine.

Engine running -> take off = Jerky start 80% of the time (but fine when the car is either pointed up or down hill)



PS. Has anyone tried changing the AUTO-HOLD setting via VCDS (03 ABS Brakes -> 10 Adaptation -> Hill Start Assistance) to address this issue? If so, care to share your findings?

[agentthumb]

Just an update on this issue, changing auto hold to release early has made a noticeable difference. The car takes off much smoother now.

Have tested hill start on some fairly steep hills, doesn't appear to have changed the behaviour of the car in that regard


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