capevettes

Just wanted to see if any of you have experienced this: Accelerating under full throttle at about 5500 RPM's, then push in the clutch to upshift,(clutch in/foot off accelerator)...upshift...back on the throttle, to the floor, and there is nothing for a moment and then it accelerates. I know with direct injection at idle there is a delay when you blip the throttle. This is almost like that only when I'm accelerating. Rev match off.

Dealer service tech has never heard of it and I will schedule an appointment. No codes have been triggered.

Thanks for any feedback.

Bill Dearborn

Haven't experienced anything like what you describe and I regularly shift in the 6K to 6.5K rpm range when on track. In a single track day I make this kind of a shift somewhere over 150 times.

Bill

davepl

Unless you were in a corner and in a PTM mode where the computer is being asked to modulate the readdition of the throttle, there should be no delay. There certainly isn't in my current A8 or last gen M6.

As long as you don't think it could be managing traction in some way, doesn't sound normal to me.

383vett

When I had a C6Z the traction control would kick in on a hard 1-2 or 2-3 shift and kill the thottle for a split second with nannies on. Not sure what a C7 m7. does. Mine is an A8.

capevettes

Thanks for your responses. This is definitely not a Traction Management issue. I remember how that felt on my C6Z. This is in a straight line just after shifting and getting back on the throttle. There is nothing there at all for like a half a second. It's too bad, the car is perfect in every other way. If it was a throttle position sensor or a computer issue I would think it would trigger a code. It definitely is not normal. I am just curious if anyone has experienced this and what the fix was.

The last thing I want is the dealership flogging my car to simulate the condition.

davepl

How'd you rule that out? I ask because the traction control on this car is much more subtle than the C6, so it's hard to know sometimes what it's doing.

It's not like the old C4 "add slack to the throttle cable" ASR system, that's for sure!

Make sure you take a look at the traction control light to see if it flickers next time, just to be doubly certain.

capevettes

Dave, I will keep an eye out for it but I really don't feel like I'm losing traction because I have just shifted and am just getting back on the throttle and it just doesn't react. No throttle at all.

One other thing: I'm in track mode alot. Aren't the nannies less intrusive in track mode?

Higgs Boson

If you are in track mode and a ptm mode like Dry, Sport, etc then the nannies are proactive rather than reactive. Jut for kicks, try it in Touring mode on the console **** and see if it still does it.

sTz

No issues here... Definitely sounds like the nannies are the culprit.

capevettes

Thanks Higgs. I will try Touring and see what happens. Maybe the Nannies are intruding too much in Track mode. Not what I expected. I will let you know how it works out.

capevettes

Maybe you guys are right. I'm just not used to Nannies kicking in when I clutch, go off throttle, shift and then hit the throttle. Maybe it's sensing an imminent problem like we have seen on some of these videos.

Driving it 500 miles to Carlisle, Pa. from Mass next Wednesday. That should give me plenty of time to assess it. My wife doesn't like the high RPM shifts, but we will see what happens.

383vett

Hold the nannie button down for 6 seconds until both lights on the dash light up and try the same shift.

MindBend

BE CAREFUL when doing this. The nannies keep you from going sideways after the shift. Don't make it another agricultural research post!

capevettes

Not a big fan of driving the Z into the woods but I will give this a try on a wide open stretch of highway. Nannies off/throttle on

Bill Dearborn

Which track mode are you in? Just placing the selector in the Track Mode position doesn't do much as far as the nannies. Once you get it in Track Mode push the center of the selector button twice and when you see Wet, Dry, Sport 1, Sport 2 and Race select Sport 1, Sport 2 or Race. Sport 1 will give you some stability control, PTM and no traction control with a slight power reduction, Sport 2 gives you PTM drops both Stability Control and Traction Control while Race gives you PTM, full power and no Stability or Traction Control.

If you aren't in any of those sub modes you may still have Traction Control. I know when I push the button twice to get into the sub modes the system defaults to wet mode which reacts very similar to the standard weather mode with a very intrusive traction control and power reduction. Just moving the selector to Track may actually put you in that default position without it being displayed. Make sure you get into Sport 1 at a minimum.

Bill

capevettes

Thanks Bill. I only moved into Sport mode and did not go into any of the sub modes. So you are saying that in doing so I may have put myself in a more intrusive mode of traction control. I may be better off in sport or touring on the street.