Autotalent
BMW Garage BMW Meets Register Today's Posts

Go Back   BMW M3 and BMW M4 Forum > BMW F80 M3 / F82 M4 Technical Topics > Engine / Drivetrain / Exhaust / Bolt-ons / Tuning

Post Reply
 
Thread Tools Search this Thread
      01-02-2015, 10:35 PM   #1
polly
Second Lieutenant
polly's Avatar
South Africa
123
Rep
241
Posts

Drives: 2010 e90 m3
Join Date: Jan 2011
Location: south africa

iTrader: (0)

Jerky take off pls help

Hi everyone
My car has only 3000km on the clock. 2 days ago I drove a 600km trip to the coast. When I got to my destination I notice that if I take off from standstill a little aggressively my car jerks a little and then she goes.
If I take off slow everything seems nice and smooth. If I am at a stop and press my accelarator half or three quarter down my car goes then gives a jerk and carry on. I tried in efficient and sport same result.
Does any member know what this might be. It makes me look like a useless driver.
Thanks in advance for any input.
Appreciate 0
      01-02-2015, 10:45 PM   #2
NorCal f80
Lieutenant Colonel
346
Rep
1,656
Posts

Drives: M3
Join Date: Apr 2014
Location: Nor Cal

iTrader: (0)

This happens to me once in a while with my DCT. I just hurry up and shift into 2nd and it's okay. I drive DCT in manual setting S2.
Appreciate 0
      01-02-2015, 10:51 PM   #3
polly
Second Lieutenant
polly's Avatar
South Africa
123
Rep
241
Posts

Drives: 2010 e90 m3
Join Date: Jan 2011
Location: south africa

iTrader: (0)

Yes u right
The moment u put it in second and floor it it's fine.
My worry is I don't remember it being there before.
Not sure if I never tramped it before because I was running the car in nor did u try the launch control yet.
Either way I'm sure this can't be normal.
Appreciate 0
      01-02-2015, 11:26 PM   #4
dkhm3
Brigadier General
dkhm3's Avatar
United_States
1882
Rep
3,341
Posts

Drives: 991.2 GT3 2020 X3MC
Join Date: Jan 2009
Location: Orange County

iTrader: (0)

What car did u have before the m? R u in the most aggressive shift setting? Have u tried in the least aggressive and efficient for the the throttle mode?
__________________
Currently:
2018 GT3 2020 X3MC

Previously:
1999 M3 2002 M3 2005 S4 2008 C63 2015 M3 2016 X5M 2019 911S
Appreciate 0
      01-03-2015, 02:30 AM   #5
Richy Rich
Colonel
Richy Rich's Avatar
United_States
3169
Rep
2,135
Posts

Drives: F80 | MKIV Supra | Aventador S
Join Date: Jan 2014
Location: Los Angeles

iTrader: (0)

This also happened in my e92.
Appreciate 0
      01-03-2015, 07:13 AM   #6
TahoeM3
Major
410
Rep
1,025
Posts

Drives: F-type R, GTR, X5 50i
Join Date: Apr 2006
Location: Tampa, Fl

iTrader: (0)

What throttle map are you in? Efficient, sport, or sport plus? Sport plus is the most sensitive and the most difficult to be smooth in. I've switched back to sport and sometimes prefer efficient because it's smoother for throttle modulation.
Appreciate 0
      01-03-2015, 12:36 PM   #7
polly
Second Lieutenant
polly's Avatar
South Africa
123
Rep
241
Posts

Drives: 2010 e90 m3
Join Date: Jan 2011
Location: south africa

iTrader: (0)

I use only efficient and sport.
Never tried sport plus.
If it's normal I can live with it.
It's just that I never felt it for the first 2500 km. I know I was running the car in so I never really gave it the beans.
Appreciate 0
      01-03-2015, 05:19 PM   #8
redfox
INSTAGRAM: @yaasplease
redfox's Avatar
Canada
166
Rep
1,023
Posts

Drives: 2015 YMB M4
Join Date: Mar 2010
Location: Toronto

iTrader: (4)

It's called the "bunny hop". There is nothing wrong with the car. It's your right foot that's the problem. With a sensitive throttle, when you press the throttle, the car's front end raises slightly, causing you to press a little harder than you intended to. So your body retracts your foot a little, causing the car to slow down, and the front end drops. Then you subconsciously press a little harder and the cycle continues until the sensitivity is eliminated, which can be done by switching to second gear, or slam on the gas pedal. To prevent it don't go beyond "sport" for throttle response.
__________________
2015 ///M4: M/Vorsteiner Aero, P3Cars, HRE R101, Dinan S2, Coils & Intake; Eis/Akra Exhaust
2013 WRX Hatchback: LED Conversion, Blacked Out, Rally Armor
2015 Macan Turbo: Techart Exhaust, Cargraphics Lowering Module, Blacked Out
Appreciate 0
Post Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:07 PM.




f80post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST