Is this limp mode?

priapism · 02-08-2017, 08:31 AM

My car is a 2012 328 rwd wagon.

I took it to the track last weekend and in the 2nd session it had this issue where when I flat footed it, nothing happened for about 1-1.5 seconds, then power would quickly but gradually build. I'd get full power but the response was weird.

I pulled off track and the issue went away.

It was 68F, sunny and dry. I can't find a temp gauge so I have no idea what temp the car was running at.

Anyone experienced this?

335stoner · 02-08-2017, 11:40 AM

limp mode would more likely keep you from building any RPM...

more like if you flooded it the car would fall flat on its face.. no rpm build, and maybe misfire depending on how the car cuts power..

davidwarren · 02-08-2017, 12:53 PM

any codes?

The HACK · 02-08-2017, 02:11 PM

DSC cutting power to prevent you from spinning out.

priapism · 02-08-2017, 02:49 PM

On a dry straight at 80mph, that's doubtful. There's no CEL but I haven't checked for codes.

GATORB8 · 02-08-2017, 02:59 PM

Auto? There's a gear kick down button at WOT that may be showing some trans issue.

It does sound a lot like what DSC does though, maybe a sensor issue causing DSC to cut power?

I would definitely pull codes with a BMW specific scanner.

priapism · 02-08-2017, 07:22 PM

Someone said when brakes fade the car will reduce power, I guess to nudge you into slowing down. Seems feasible but it's the first I'm hearing. Makes sense as the car worked again once it cooled down a touch.

The HACK · 02-09-2017, 06:48 PM

Quote:

Originally Posted by priapism

On a dry straight at 80mph, that's doubtful. There's no CEL but I haven't checked for codes.

Why are you just getting into the throttle at 80mph on a straight? You should be on throttle much earlier than that.

bbnks2 · 02-10-2017, 09:08 PM

Brake disc overheating protection... you need to code it off. Bmw seems to have set this function to intervene very early on x28i models.

priapism · 02-14-2017, 07:50 PM

Quote:

Originally Posted by The HACK

Why are you just getting into the throttle at 80mph on a straight? You should be on throttle much earlier than that.

Because I thought the car was broken and was trying to figure out what was wrong. It was a nearly empty track and there were no cars around me.

tlow98 · 03-13-2017, 02:55 AM

Quote:

Originally Posted by bbnks2

Brake disc overheating protection... you need to code it off. Bmw seems to have set this function to intervene very early on x28i models.

This. On all e90s

02-08-2017, 08:31 AM	#1
priapism Enlisted Member 11 Rep 38 Posts Drives: Spec E30, e91 m-sport, i4 Join Date: Sep 2016 Location: 70130 / 91403 iTrader: (0)	Is this limp mode? My car is a 2012 328 rwd wagon. I took it to the track last weekend and in the 2nd session it had this issue where when I flat footed it, nothing happened for about 1-1.5 seconds, then power would quickly but gradually build. I'd get full power but the response was weird. I pulled off track and the issue went away. It was 68F, sunny and dry. I can't find a temp gauge so I have no idea what temp the car was running at. Anyone experienced this?
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02-08-2017, 11:40 AM	#2
335stoner BRR tuned 220 Rep 646 Posts Drives: 335D black Join Date: Nov 2016 Location: cypress tx iTrader: (0)	limp mode would more likely keep you from building any RPM... more like if you flooded it the car would fall flat on its face.. no rpm build, and maybe misfire depending on how the car cuts power..
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02-08-2017, 12:53 PM	#3
davidwarren Captain 191 Rep 676 Posts Drives: M8C GC Join Date: Dec 2011 Location: Louisville, ky iTrader: (0)	any codes? __________________ 2010 335i e90 Le Mans Blue/Chestnut Brown \| M-Sport \| 6MT
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02-08-2017, 02:11 PM	#4
The HACK Midlife Crises Racing Silent but Deadly Class 1831 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	DSC cutting power to prevent you from spinning out. __________________ Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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02-08-2017, 02:49 PM	#5
priapism Enlisted Member 11 Rep 38 Posts Drives: Spec E30, e91 m-sport, i4 Join Date: Sep 2016 Location: 70130 / 91403 iTrader: (0)	On a dry straight at 80mph, that's doubtful. There's no CEL but I haven't checked for codes.
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02-08-2017, 02:59 PM	#6
GATORB8 Captain 226 Rep 807 Posts Drives: 2011 335is 6MT Join Date: Jan 2016 Location: Chicago iTrader: (0) Garage List 2011 BMW 335is [9.50]	Auto? There's a gear kick down button at WOT that may be showing some trans issue. It does sound a lot like what DSC does though, maybe a sensor issue causing DSC to cut power? I would definitely pull codes with a BMW specific scanner.
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02-08-2017, 07:22 PM	#7
priapism Enlisted Member 11 Rep 38 Posts Drives: Spec E30, e91 m-sport, i4 Join Date: Sep 2016 Location: 70130 / 91403 iTrader: (0)	Someone said when brakes fade the car will reduce power, I guess to nudge you into slowing down. Seems feasible but it's the first I'm hearing. Makes sense as the car worked again once it cooled down a touch.
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02-10-2017, 09:08 PM	#9
bbnks2 Colonel 1222 Rep 2,030 Posts Drives: 135i N55 Join Date: Jan 2017 Location: NY iTrader: (0)	Brake disc overheating protection... you need to code it off. Bmw seems to have set this function to intervene very early on x28i models.
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