Power loss

TigMik · 04-21-2013, 05:00 AM

Need help guys .....

When I accelerate hardish from a standing start, the car will set off on full throttle then violently cut all power in first gear, then it comes back again and then does it again in second gear sometimes. It catapults anybody in the car backwards, then forwards then back into the seat. It is bloody annoying.
I have had a new HPFP fitted and have tried the car in all modes of DSC, on, semi on and off and it makes no difference.
What the hell is wrong with it???

335DEE · 04-21-2013, 05:46 AM

is it remapped ?

TigMik · 04-21-2013, 06:16 AM

JB4 map 5, ETS fmic and AR Catless DP's.

335DEE · 04-21-2013, 06:36 AM

Overboosting perhaps?

ashmostro · 04-21-2013, 06:41 AM

Loss of traction due to no LSD. Turn off traction control and see what happens.

Edit- missed that you have tried without traction control. Still think this is typical open diff behavior though...

zltm089 · 04-21-2013, 07:32 AM

any codes?

when you say "cuts power", are you talking about the engine reduced power warning light?

TigMik · 04-21-2013, 08:04 AM

There's no codes and no lights, it's as though the engine turns off for a second then comes back on again at full throttle. It's awful and very violent, just throws you forward like you've hit a wall. Ruining driving the car for me.

phil200tdi · 04-21-2013, 08:11 AM

Read codes and do some logging via jb4 USB - send to terry

sixpot · 04-21-2013, 01:41 PM

Try it on a different map number, as map 5 is an auto-learning map.

TigMik · 04-21-2013, 01:51 PM

Quote:

Originally Posted by sixpot

Try it on a different map number, as map 5 is an auto-learning map.

I was thinking that. Maybe map 2 yeah??

04-21-2013, 05:00 AM	#1
TigMik Private First Class 13 Rep 195 Posts Drives: Back in an M3! Join Date: May 2012 Location: Manchester UK iTrader: (0)	Power loss - Frusrating!!!!! Need help guys ..... When I accelerate hardish from a standing start, the car will set off on full throttle then violently cut all power in first gear, then it comes back again and then does it again in second gear sometimes. It catapults anybody in the car backwards, then forwards then back into the seat. It is bloody annoying. I have had a new HPFP fitted and have tried the car in all modes of DSC, on, semi on and off and it makes no difference. What the hell is wrong with it???
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04-21-2013, 05:46 AM	#2
335DEE Captain 38 Rep 735 Posts Drives: M3 DCT Join Date: Feb 2009 Location: England iTrader: (1)	is it remapped ?
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04-21-2013, 06:16 AM	#3
TigMik Private First Class 13 Rep 195 Posts Drives: Back in an M3! Join Date: May 2012 Location: Manchester UK iTrader: (0)	JB4 map 5, ETS fmic and AR Catless DP's.
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04-21-2013, 06:36 AM	#4
335DEE Captain 38 Rep 735 Posts Drives: M3 DCT Join Date: Feb 2009 Location: England iTrader: (1)	Overboosting perhaps?
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04-21-2013, 06:41 AM	#5
ashmostro Brigadier General 1254 Rep 4,088 Posts Drives: 2020 M4cs \| 2022 M550i Join Date: Jan 2013 Location: Falls Church, VA iTrader: (27)	Loss of traction due to no LSD. Turn off traction control and see what happens. Edit- missed that you have tried without traction control. Still think this is typical open diff behavior though...
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04-21-2013, 07:32 AM	#6
zltm089 Banned 247 Rep 7,690 Posts Drives: 335i SE Coupe Space Grey Join Date: Nov 2008 Location: LONDON iTrader: (0) Garage List 2006 BMW 335i [10.00]	any codes? when you say "cuts power", are you talking about the engine reduced power warning light?
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04-21-2013, 08:04 AM	#7
TigMik Private First Class 13 Rep 195 Posts Drives: Back in an M3! Join Date: May 2012 Location: Manchester UK iTrader: (0)	There's no codes and no lights, it's as though the engine turns off for a second then comes back on again at full throttle. It's awful and very violent, just throws you forward like you've hit a wall. Ruining driving the car for me.
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04-21-2013, 08:11 AM	#8
phil200tdi Colonel 112 Rep 2,621 Posts Drives: 335i M Sport E90 LCI manual Join Date: Jan 2011 Location: Aylesbury iTrader: (1)	Read codes and do some logging via jb4 USB - send to terry __________________ Car: e91 330d with Viezu map Gone but not forgotten: 2010 Jaguar XFR (Cat-back exhaust, pulley, intake mods and map), Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)
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04-21-2013, 01:41 PM	#9
sixpot Second Lieutenant 19 Rep 264 Posts Drives: BMW 335i Coupe Join Date: Oct 2011 Location: North West iTrader: (5)	Try it on a different map number, as map 5 is an auto-learning map.
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