Jerkiness when accelerating after stop

e92phreak · 06-20-2007, 06:30 PM

I know this topic has been discussed many times. I just can't find them in the search.

My car jerks forward quite a bit when accelerating after a stop (1st gear). I have the steptronic auto transmission.

The only way I can prevent the jerkiness is if I go VERY VERY slow and accelerate VERY slowly, which pisses the people behind me off.

Has anyone brought their car into the dealership to have this worked on?

MonacoBimm · 06-20-2007, 06:31 PM

My car does this when the engine is cold.

GraphiteBrawler · 06-20-2007, 06:31 PM

Mine does this randomly as well.

e92phreak · 06-20-2007, 06:32 PM

Quote:

Originally Posted by MonacoBimm

My car does this when the engine is cold.

I still get it after the car is warmed up. Sucks when you have coffee in the car LOL...

pjkilz · 06-20-2007, 06:34 PM

yea i get this same thing. to prevent it i just choose to accelerate a little slower at the beginning, then i press the pedal down more..

it also saves gas.. i guess its somethin u jus gotta get used to

island111 · 06-21-2007, 05:51 AM

This is because the car starts off in 2nd gear. It takes time for it get get into the power band. Try putting it into sport. This way it will start in first and you will not have the hesitation

DrewKo · 06-21-2007, 07:25 AM

It may also be because the engine is cold.

Originally Posted by DrewKo
Hmm, I have been using the standard 1.45 map since it came out and my car feels pretty much fine. I haven't thrown any codes and have not experienced any bucking at 50 mph.

The only thing that happens from time to time, and I doubt it has anything to do with procede, is when the engine is cold, and I press the gas from a stop or slight roll at 5-10 mph, the car may lurch forward when the gas hits the engine and there is a very, very slight pause from when I press the gas and the acceleration starts....and I'm not going wide open throttle, simply pressing the gas to get up to about 40 mph. It doesn't do it everytime, just maybe once every 10 or more days. No bucking and no codes though. I thought it might be turbo lag, but since it doesn't happen all the time, maybe it is just that the engine needs to warm up. It never happens when the engine is warmed up.

--------------
That is correct. When engine temps are cold, the vacuum tanks that control the boost control system are relieved of vacuum. Hence, no boost when the throttle goes down. The vacuum tanks only charge up when the engine is warm.

Shiv

bmw318i_95 · 06-21-2007, 08:14 AM

If the steptronic is adaptive can you get it reset?

darkcloud · 06-21-2007, 08:18 AM

Im sorry to tell you but your car has the HIV

. You better send it to me so I can take care of it

.

Joe Bimmer · 06-21-2007, 09:39 AM

Quote:

Originally Posted by e92phreak

I know this topic has been discussed many times. I just can't find them in the search.

My car jerks forward quite a bit when accelerating after a stop (1st gear). I have the steptronic auto transmission.

The only way I can prevent the jerkiness is if I go VERY VERY slow and accelerate VERY slowly, which pisses the people behind me off.

Has anyone brought their car into the dealership to have this worked on?

I brought mine in for this reason, and they completely fixed it with a software update. The newest version of software has step-transmission software updates included. I also had them delete the Neutral Idle Control which disengages & re-engages the torque converter at red lights. Now, it stays connected all the time, and I have no delays or hesitations at all when accelerating from a stop.

I specifically asked for the Neutral Idle Control to be deleted. They were happy to do it, and combined with the updated ECU software (v25.01 I think), solved my similar issue as yours.

Gort · 06-21-2007, 10:40 AM

Mine is MT and when it is cold it bucks like a rodeo bronco in 1st gear if I accelerate too hard. Pushing and holding the DTC button until the symbol below comes on the dash helps a lot until it warms up. Just need to remember that it's set that way. I am hoping Progman V25 helps it when I get it done in a few weeks.

Docray1 · 06-21-2007, 10:42 AM

I wonder if that "Neutral Idle Control" may be resulting in what I had thought were unusually 'grabby' or 'jerky' brakes that I have noticed with my 335? Perhaps that re-engaging torque converter is the culprit. . .

DrewKo · 06-21-2007, 02:28 PM

Quote:

Originally Posted by Joe Bimmer

I brought mine in for this reason, and they completely fixed it with a software update. The newest version of software has step-transmission software updates included. I also had them delete the Neutral Idle Control which disengages & re-engages the torque converter at red lights. Now, it stays connected all the time, and I have no delays or hesitations at all when accelerating from a stop.

I specifically asked for the Neutral Idle Control to be deleted. They were happy to do it, and combined with the updated ECU software (v25.01 I think), solved my similar issue as yours.

That is interesting...I do not have idrive...same with you?

Joe Bimmer · 06-21-2007, 03:06 PM

Quote:

Originally Posted by DrewKo

That is interesting...I do not have idrive...same with you?

No iDrive here. Everyone with STEP should get these repairs made IMO. (I asked them to disable NIC & that the transmission is jerky at times and doesn't shift smooth from a start.)

I've always been bothered by the jerky nonsense when coming to a stop, and when taking off from a stop. There was always this unpredictable hesitation and random 'thud' / 'bump' feeling; it was one of those things that some people couldn't notice with my car, but I definitely could. It finally bothered me enough to take it in. Both of those issues have been resolved, and I'm now a happy BMW driver.

Bimmer335i · 06-21-2007, 05:01 PM

I do get the gentle jerk too, but I have the automatic. Note that it's quite gentle and only when it's relatively cold. Any issue with this or I'm just overly excited about this whole transmission stuff!?

e92phreak · 06-21-2007, 05:13 PM

Quote:

Originally Posted by darkcloud

Im sorry to tell you but your car has the HIV

. You better send it to me so I can take care of it

.

I'll send it to you for $56k (shipping included).

dkbimmer · 06-21-2007, 11:15 PM

Quote:

Originally Posted by Docray1

I wonder if that "Neutral Idle Control" may be resulting in what I had thought were unusually 'grabby' or 'jerky' brakes that I have noticed with my 335? Perhaps that re-engaging torque converter is the culprit. . .

I had my 335i with auto for several weeks now and the brakes feel like what you are describing...grabby/jerky. I would let the brakes go and they seem to stay engaged for a split second. I wonder if I should have my software checked out. My car was built at the end of March.

ironic · 06-21-2007, 11:19 PM

i get the same thing, i tohught it had to do w/ the turbo because it kicks in so low, it might just punch a little when it hits the 1300rpm

ex-poster · 06-27-2007, 04:38 PM

I had my e90 330 in for service for grabby brakes - they seem to have fixed it and they indicated there was a TSB out for this issue, they also indicated an issue with the torque converter.

Oh, when I say they fixed it, I mean they got rid of most of it, it's still there to some extent, much much less than before though. I'll have to see if I can't find the TSB...

Mr. 5 · 06-27-2007, 05:04 PM

I was about to say CDV but then I noticed that you had an auto.
I agree with Gort though. Make sure you aren't activating the DSC.

Javier · 06-27-2007, 05:05 PM

dude 1st gear is always jerky. you just have to be really subtle with your right foot.

RRGOO7 · 06-27-2007, 05:06 PM

my gfs 335 does the same thing

06-20-2007, 06:30 PM	#1
e92phreak General 384 Rep 21,747 Posts Drives: E92 335i TiAg/E46 323i TiAg Join Date: Mar 2007 Location: CA iTrader: (1) Garage List 2007 E92 335i [9.50] 2000 E46 323i [0.00]	Jerkiness when accelerating after stop I know this topic has been discussed many times. I just can't find them in the search. My car jerks forward quite a bit when accelerating after a stop (1st gear). I have the steptronic auto transmission. The only way I can prevent the jerkiness is if I go VERY VERY slow and accelerate VERY slowly, which pisses the people behind me off. Has anyone brought their car into the dealership to have this worked on? __________________ 07 E92 335i \| TiAg \| Step \| Padl \| Cmft \| Alum Trm \| PDC \| Nav \| Assist \| Sat \| Lthr \| Prem \| Sprt \| Rear Splr \| RDSport Quads \| iPod \| V1 \| LT Refl \| VS Clear Bra \| OEM Lip \| KWV2 \| Mtec Sides \| BBS LM-R 00 E46 323i \| TiAg \| 5sp \| Sport \| Roof \| RDSport Cams \| RDSport tune \| RDSport Shift \| Volk LE37 \| M3 spoiler \| PSS9 \| SuperSprint \| Brembo
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06-20-2007, 06:31 PM	#2
MonacoBimm Banned 44 Rep 1,859 Posts Drives: Sapp. Black 330i(2nd e90) Join Date: Jun 2006 Location: Panama City, Panama iTrader: (1)	My car does this when the engine is cold.
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06-20-2007, 06:31 PM	#3
GraphiteBrawler Elton John Impersonator 43 Rep 355 Posts Drives: 2016 LCI M3 Join Date: Jun 2007 Location: Boston, MA iTrader: (0)	Mine does this randomly as well. __________________ 2016 LCI M3 - Mineral White, SO Extended, 6MT, Exec Package, 18" 513m. 2005 Evo VIII Time Attack: Garrett, Cosworth, ID, Vipec, Ralliart, ARP, Injen, ETS, Walbro, Kognition, OMP, Schroth
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06-20-2007, 06:34 PM	#5
pjkilz Private 2 Rep 77 Posts Drives: Black 335i Coupe w/ Aero Kit Join Date: Jun 2007 Location: Los Angeles, CA iTrader: (0)	yea i get this same thing. to prevent it i just choose to accelerate a little slower at the beginning, then i press the pedal down more.. it also saves gas.. i guess its somethin u jus gotta get used to
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06-21-2007, 05:51 AM	#6
island111 Private First Class 7 Rep 138 Posts Drives: 335 Join Date: Apr 2007 Location: USA East Coast iTrader: (0)	This is because the car starts off in 2nd gear. It takes time for it get get into the power band. Try putting it into sport. This way it will start in first and you will not have the hesitation
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06-21-2007, 07:25 AM	#7
DrewKo Lieutenant Colonel 44 Rep 1,568 Posts Drives: 335i Montego Blue Saddle Brown Join Date: Jan 2007 Location: Atlanta, GA iTrader: (4) Garage List 2007 335i [0.00]	It may also be because the engine is cold. Originally Posted by DrewKo Hmm, I have been using the standard 1.45 map since it came out and my car feels pretty much fine. I haven't thrown any codes and have not experienced any bucking at 50 mph. The only thing that happens from time to time, and I doubt it has anything to do with procede, is when the engine is cold, and I press the gas from a stop or slight roll at 5-10 mph, the car may lurch forward when the gas hits the engine and there is a very, very slight pause from when I press the gas and the acceleration starts....and I'm not going wide open throttle, simply pressing the gas to get up to about 40 mph. It doesn't do it everytime, just maybe once every 10 or more days. No bucking and no codes though. I thought it might be turbo lag, but since it doesn't happen all the time, maybe it is just that the engine needs to warm up. It never happens when the engine is warmed up. -------------- That is correct. When engine temps are cold, the vacuum tanks that control the boost control system are relieved of vacuum. Hence, no boost when the throttle goes down. The vacuum tanks only charge up when the engine is warm. Shiv
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06-21-2007, 08:14 AM	#8
bmw318i_95 New Member 0 Rep 27 Posts Drives: E90 Join Date: Jun 2007 Location: Philippines iTrader: (0)	If the steptronic is adaptive can you get it reset?
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06-21-2007, 08:18 AM	#9
darkcloud Colonel 335 Rep 2,385 Posts Drives: 09 VW JSW Join Date: Aug 2006 Location: cleveland, oh iTrader: (2) Garage List 2006 325i [0.00]	Im sorry to tell you but your car has the HIV. You better send it to me so I can take care of it. __________________ retired 06 E90 325i New: 09 VW Platinum Grey Jetta Sportwagen 2.0T SEL w/DSG, panoramic sunroof and Ipod adapter
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06-21-2007, 10:40 AM	#11
Gort Klaatu Barada Nikto 28 Rep 1,169 Posts Drives: 2017 X3-35i Join Date: Apr 2007 Location: A Bipolar Planet iTrader: (0)	Mine is MT and when it is cold it bucks like a rodeo bronco in 1st gear if I accelerate too hard. Pushing and holding the DTC button until the symbol below comes on the dash helps a lot until it warms up. Just need to remember that it's set that way. I am hoping Progman V25 helps it when I get it done in a few weeks. Attached Images
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06-21-2007, 10:42 AM	#12
Docray1 Private 31 Rep 94 Posts Drives: 2024 BMW Z4 Join Date: Oct 2006 Location: Sarasota, FL iTrader: (0)	I wonder if that "Neutral Idle Control" may be resulting in what I had thought were unusually 'grabby' or 'jerky' brakes that I have noticed with my 335? Perhaps that re-engaging torque converter is the culprit. . .
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06-21-2007, 05:01 PM	#15
Bimmer335i Major 49 Rep 1,353 Posts Drives: 07 Sparkling Graphite 335i Sed Join Date: Jun 2007 Location: San Diego, CA US iTrader: (0)	I do get the gentle jerk too, but I have the automatic. Note that it's quite gentle and only when it's relatively cold. Any issue with this or I'm just overly excited about this whole transmission stuff!?
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06-21-2007, 11:19 PM	#18
ironic Major General 254 Rep 8,338 Posts Drives: Jet Black 335i Join Date: Dec 2006 Location: San Francisco, Ca iTrader: (22)	i get the same thing, i tohught it had to do w/ the turbo because it kicks in so low, it might just punch a little when it hits the 1300rpm __________________ Widebody 335i Project Car BUILD \| PHOTOSHOOT
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06-27-2007, 04:38 PM	#19
ex-poster Lieutenant 19 Rep 482 Posts Drives: 2000 328, 2006 330 Join Date: Jul 2005 Location: Chicago Burbs iTrader: (0)	I had my e90 330 in for service for grabby brakes - they seem to have fixed it and they indicated there was a TSB out for this issue, they also indicated an issue with the torque converter. Oh, when I say they fixed it, I mean they got rid of most of it, it's still there to some extent, much much less than before though. I'll have to see if I can't find the TSB...
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06-27-2007, 05:04 PM	#20
Mr. 5 Modder Raider 753 Rep 8,633 Posts Drives: M3 Join Date: Apr 2007 Location: Surf City, HB iTrader: (31) Garage List 2007 e90 335i [8.00]	I was about to say CDV but then I noticed that you had an auto. I agree with Gort though. Make sure you aren't activating the DSC. __________________ e36 M3 Coupe, e36 325i Sedan e90 335i--SOLD Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
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06-27-2007, 05:05 PM	#21
Javier Major 80 Rep 1,109 Posts Drives: 335i E92 Join Date: Nov 2006 Location: Puerto Rico iTrader: (0)	dude 1st gear is always jerky. you just have to be really subtle with your right foot. __________________ 2007 328i Crimson Red SOLD 2010 335i MSport AW E92
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06-27-2007, 05:06 PM	#22
RRGOO7 Colonel 360 Rep 2,451 Posts Drives: GTR Join Date: Dec 2006 Location: Miami FL iTrader: (13)	my gfs 335 does the same thing
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