Momentary power loss?

[RSphantom]

I have had the same thing also, always when driving at very low speed (sub 20km/h) in traffic. Then as traffic speed increases and I press the accelerator nothing happens for a few seconds and engine remains at idle. The last time it was around 5 seconds and car almost stopped rolling before the engine responded to the gas peddle. Don't think I hit brake as well but who knows. I have never had this happen at normal or higher speeds either.

I didn't have it on my RS4 but it did happen on one of my RS5's. Exactly as described above and usually when the engine hadn't fully warmed up. When it happens check what gear your in as mine wouldn't change down and was in seventh, hence the feeling of no power as it was try to accelerate in 7th from about 850rpm. I put it down to the gearbox getting into a mess and couldn't work out it should change down, then after about three to five seconds it drops down and off you go. Therefore, if anything I think its a gearbox software issue rather than engine or fuelling. It would try using the paddles if it happens again to change down or as already said, trip to the dealers. Problem is if like mine it was once in a blue moon that it would do it so almost impossible to trace

[Graeme4130]

I have had the same thing also, always when driving at very low speed (sub 20km/h) in traffic. Then as traffic speed increases and I press the accelerator nothing happens for a few seconds and engine remains at idle. The last time it was around 5 seconds and car almost stopped rolling before the engine responded to the gas peddle. Don't think I hit brake as well but who knows. I have never had this happen at normal or higher speeds either.

Do you know if it held the gear too (ie, needed to be in 2nd but stayed in 4th)
Odd question I know, but a mates RS5 does this occasionally and their fix was to replace a unit in the gear box. The engine was being held as it's momentarily taken off power whilst the box hits the cog you want. If the gearbox doesn't hit the gear then the engine won't get given power. Was an easy fix on the rs5 but had the tech's scratching their heads for a while

[1199Panigale]

I don't think its a gearbox issue as revs just stay at normal idle speed and pressing the gas peddle has no effect at all as opposed to being stuck in a high gear and the engine labouring. I will try to take more notice next time it happens and see what I can figure out. On the way into the office today I tried pressing/tapping the brake pedal with my left foot while gently feeding in some gas to see if the bumped brake pedal theory was likely but I couldn't get it to fault at all so guess this theory is somewhat unlikely.

[RSQ]

I will watch mine too. Quite reproducible if you left foot brake and push throttle.

But in 25 years of driving I think I would have noticed if I was pressing brake at same time.

I may print this thread and give it to my Audi technician.

[eightfoot]

Has anyone else had this, typically when picking up from low speed?

It's infrequent (sods law) but also rather annoying. Revs just drop despite the accelerator being pressed & then 1-2 seconds later the car takes up & goes. Mines been doing it for about a month now (at a guess its happened 5 times), typically when in mild traffic...

this is what mine does :- i drive mostly in comfort but if you pull away slowly with light throttle pressure it will be in 7th by 30mph so then if you push the throttle a little you dont get any excelleration as such especially if going up an incline so you then press a bit harder resulting in no excelleration so you press a bit more harder and it kicks down to 4th or 5th speeds up and takes forever to change to the next gear especially if you back of the gas,i've found its easier to just flick the -paddle to 6th gear you dont need anymore gas and it will change back to 7th in its own time,dont think there is any thing wrong its just the torque limiting on the auto box,think i've had it do it in auto also,bet it doesnt do it in dynamic or manual does it,dont worry cause if i thought it was a problem i'm the bloke that would be straight back at the dealers getting it sorted out,quirk of s-tronic gear box with a normal aspirated v8 that doesnt get going till over 3000rpm,drive and be amazed at what a good allround car you have

[smudge]

I've seen it do this in 4th, so I don't think its a 'quirk' of the s-tronic tbh.

[S4Player]

Traction control kicking in

[smudge]

Traction control kicking in

Seriously?

[S4Player]

By the sounds of it, it could be yes. Tc kicking will cause what feels like a momentary loss of power. Maybe I've read the symptoms wrong?

[smudge]

By the sounds of it, it could be yes. Tc kicking will cause what feels like a momentary loss of power. Maybe I've read the symptoms wrong?

Its definitely not TC kicking in, the conditions have never warranted it for starters, not from my side for sure.

[1199Panigale]

I had this happen again today, doing maybe 20-30km/h in line of traffic while pressing very gently on gas,trans was in drive 3rd gear (D3) at appx 1800rpm when gas peddle stopped responding, I noted that rpm stayed at 1800rpm and speed held constant but no matter what I did, I did not accelerate. I managed to pump gas peddle to floor 2 or 3 times with no result before it was back to business as usual - rather odd really. I looked at rpm and gear selection first before finally remembering to check speed so the first 2 def accurate and speed is best guess. Is this what others have experienced?

[smudge]

Yes, pretty much exactly as you describe.

Mines in at Jack Barclays this week with a number of niggles, including this. They've got her for the whole week to look at this in some depth, along with a service, squeaking folding mirrors a few rattles & knocking from the wheels (I think this is the shocks issue others have mentioned), so hopefully they'll find something.

I'll keep you all posted.

[1199Panigale]

I also have the squeaky folding mirrors and a door rattle (although not 100% sure the rattle is not something I or the kids have dropped in an odd place and is now rattling). Post up how they got on with fixes when you get the vehicle back.

[Moonmonkey831]

had this power loss scenario this morning on the way to work

Stuck in traffic for a bit, then pressed the accelerator and nothing happened - pressed it again. nothing

Then changed gear manually and finally the power arrived - very odd

[Astonished]

I've had exactly the same thing with my VW R36. I got it in 2008 and particularly when coming out of the car park at the office I'd start off into the traffic, ease of on the accelerator and then need it to go again and .... Nothing, for what seemed like forever (especially if a truck was closing the gap on me) but was only a second or three and then pick up again.

I haven't really noticed it for the past 4 years ... It either tuned itself out, sorted itself with software updates/resets or I got used to driving around it.

It was certainly worse when I left foot braked or quickly came off the brake, but not only then.

Magically I don't have it happen, or just don't notice it , now

My reckoning is that it's part of the VAG control system associated with the DSG and motor interaction.

Oh yeh, left foot braking is not meant to work on the R36, but with good country driving you can use it, although to extreme. I had been underthe impression that the RS4, being a classier more sporting drive than the R36 allowed left foot braking. From reading here, and reading APR flash upgrades that reintroduce the ability, it seems like I'll have the same interaction as the R36.

I have been really happy with the R36 and the way it's done things, which is one of the reasons why the C63 doesn't quite suit me and why the RS4 does!

So, I'll still be very happy when my RS4 arrives late July.