Weird loss of power issue

bigjae1976 · 10-23-2014, 05:47 PM

I dropped of my 2011 DCT...the famous contaminated brake booster sensor limp mode situation. Right before I started getting the occasional limp mode from the brake booster sensor, my DCT would be acting a little funky at low RPMs in wife mode (D2). It would kind of delay and then slam down a gear as I came to a stop.

So dropped it off at the dealership, got it all fixed. Picked it up from the dealer and was driving back to work. So once it warmed up, I would start from a red light and it felt like it was in limp mode. No SES light or wanrning. Then after 10 seconds of having the pedal floored, then it accelerated like normal. No clunky or weird shifting.

The engine wouldn't blip on downshifts in S/D4 also.

I say its a DCT software problem. Any idea?

BPMSport · 10-23-2014, 05:51 PM

Quote:

Originally Posted by bigjae1976

I dropped of my 2011 DCT...the famous contaminated brake booster sensor limp mode situation. Right before I started getting the occasional limp mode from the brake booster sensor, my DCT would be acting a little funky at low RPMs in wife mode (D2). It would kind of delay and then slam down a gear as I came to a stop.

So dropped it off at the dealership, got it all fixed. Picked it up from the dealer and was driving back to work. So once it warmed up, I would start from a red light and it felt like it was in limp mode. No SES light or wanrning. Then after 10 seconds of having the pedal floored, then it accelerated like normal. No clunky or weird shifting.

The engine wouldn't blip on downshifts in S/D4 also.

I say its a DCT software problem. Any idea?

Should throw a code if exhibiting that behavior.

Scan it and see. Doesn't sound like a DCT issue to me. Sounds like a torque management / throttle / pedal or sensor issue.

bigjae1976 · 10-23-2014, 05:55 PM

Quote:

Originally Posted by Mike Benvo

Should throw a code if exhibiting that behavior.

Scan it and see. Doesn't sound like a DCT issue to me. Sounds like a torque management / throttle / pedal or sensor issue.

OK, thanks. That probably makes more sense. Its back at the dealer anyway. Still milking that last 9 months of warranty! Just trying to get a read on what I can expect from the dealer.

MilehighM3 · 10-23-2014, 10:12 PM

Hopefully they sort it out quickly. There could also be an adaptation issue depending on what they did, or didn't do, during the scope of the repair.

1MOREMOD · 10-23-2014, 10:20 PM

You broke it by pushing the big pedal too hard. Time to sell.

MilehighM3 · 10-24-2014, 07:07 AM

Quote:

Originally Posted by 1MOREMOD

You broke it by pushing the big pedal too hard. Time to sell.

You're saying operator error?

1MOREMOD · 10-24-2014, 10:59 AM

Quote:

Originally Posted by MilehighM3

You're saying operator error?

Probably.

bigjae1976 · 10-24-2014, 05:14 PM

Surprise...dealer can't replicate it. It will forever be a mystery!

TrevorM3 · 10-24-2014, 05:29 PM

Quote:

Originally Posted by bigjae1976

Surprise...dealer can't replicate it. It will forever be a mystery!

i hate when i get that answer. I hope it doesn't show up after your warranty. that shit would make me very paranoid

bigjae1976 · 10-24-2014, 10:49 PM

Quote:

Originally Posted by TrevorM3

i hate when i get that answer. I hope it doesn't show up after your warranty. that shit would make me very paranoid

I think I'll be OK. Just not fun when I'm puttering along in a 414hp car in the rush hour drag race home.

10-23-2014, 05:47 PM	#1
bigjae1976 Major General 1571 Rep 8,076 Posts Drives: 11 E90 M3 Individual Join Date: Mar 2006 Location: Houston, TX iTrader: (22) Garage List 2004 BMW M3 [4.50] 2011 BMW E90 M3 [5.25] 2013 BMW 328i [5.00]	Weird loss of power issue I dropped of my 2011 DCT...the famous contaminated brake booster sensor limp mode situation. Right before I started getting the occasional limp mode from the brake booster sensor, my DCT would be acting a little funky at low RPMs in wife mode (D2). It would kind of delay and then slam down a gear as I came to a stop. So dropped it off at the dealership, got it all fixed. Picked it up from the dealer and was driving back to work. So once it warmed up, I would start from a red light and it felt like it was in limp mode. No SES light or wanrning. Then after 10 seconds of having the pedal floored, then it accelerated like normal. No clunky or weird shifting. The engine wouldn't blip on downshifts in S/D4 also. I say its a DCT software problem. Any idea? __________________ 2018 F30 320iX Melbourne Red 2011 E90 M3 Monte Carlo Blue 2004 E46 M3 Imola Red 2000 E36/7 Z3 Steel Blue
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10-23-2014, 10:12 PM	#4
MilehighM3 Brigadier General 915 Rep 3,456 Posts Drives: Harrop E90 M3 Join Date: May 2011 Location: Colorado Springs iTrader: (14) Garage List 2009 E90 M3 [6.50]	Hopefully they sort it out quickly. There could also be an adaptation issue depending on what they did, or didn't do, during the scope of the repair.
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10-23-2014, 10:20 PM	#5
1MOREMOD - 11817 Rep 23,187 Posts Drives: Race car-> Join Date: Mar 2009 Location: check your mirrors iTrader: (5)	You broke it by pushing the big pedal too hard. Time to sell.
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10-24-2014, 05:14 PM	#8
bigjae1976 Major General 1571 Rep 8,076 Posts Drives: 11 E90 M3 Individual Join Date: Mar 2006 Location: Houston, TX iTrader: (22) Garage List 2004 BMW M3 [4.50] 2011 BMW E90 M3 [5.25] 2013 BMW 328i [5.00]	Surprise...dealer can't replicate it. It will forever be a mystery! __________________ 2018 F30 320iX Melbourne Red 2011 E90 M3 Monte Carlo Blue 2004 E46 M3 Imola Red 2000 E36/7 Z3 Steel Blue
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