Throttle delay from stop

Asiann · 08-05-2006, 12:13 AM

Quote:

Originally Posted by adr

Mine is auto and I used to feel the throttle hesitation in the acceleration from complete stop that you guys talked about. but after I removed the carbon filter, I barely notice any hesitation. so I guess the carbon filter somewhat causes the hesitation.

I asked the tech about the carbon filter and its suppose to keep the fumes from getting inside.

adr · 08-05-2006, 12:34 AM

I doubt that the carbon filter can provide any air quality management. When I took out the carbon from my 6 months old car, 80% of carbon did not sizzle when it was first wetted, which means that most of the carbon in the filter were not active/viable. So I don't think the carbon filter can leach fumes as BMW would suggest.

Considering the carbon filter is relatively thick and not quite flow free, I guess it may be a resistance to the efficiency of air flow. (Which may affect the throttle response.)

SRT · 08-05-2006, 01:20 AM

The carbon filter could be the issue - might be the fuel octane rating too

bavarian19 · 08-05-2006, 07:11 AM

Quote:

Originally Posted by ksfrogman

This may not be what you are talking about, but when you floor the throttle quickly enough to induce tire spin, the DSC/DTC intervenes momentarily. It seems as if the engine stutters or hesitates. To avoid this, deactivate the DSC/DTC.

I drive most of the time with the traction control off... wasnt that...

ShinyRedCar · 08-05-2006, 07:50 AM

Quote:

Originally Posted by dejav0o

... I usually take my foot off the brake and wait 1/2 second before stepping on the gas...

I have found this to work for me as well. As annoying as it is, I've learned to live with the hesitation. Waiting a 1/2 second before giving the car gas seems to help but putting the transmission in DS mode solves the problem outright...at least for me.

Sekiray · 08-05-2006, 05:11 PM

yea its annoying... does the DS mode really solve the problem?

Asiann · 08-05-2006, 05:17 PM

Quote:

Originally Posted by Sekiray

yea its annoying... does the DS mode really solve the problem?

Better response than normal D mode. I don't notice any lag there.

Joe Bimmer · 08-05-2006, 05:55 PM

Quote:

Originally Posted by Asiann

Better response than normal D mode. I don't notice any lag there.

I'm pretty sure D starts you out in 2nd gear, whereas DS starts out in 1. If you switch back-and-forth at a stop light from D to DS, you can feel the tranny shifting gears...and you can watch the RPM's react as well.

I still can notice a bit of lag in DS, but I'm used to it so I don't care anymore.

xG35c · 08-05-2006, 08:38 PM

I have a feeling this lag or hesitation that everyone thinks they're experiencing is...FIRST GEAR!

Gentle acceleration from a stop briefly uses the Step's very short first gear which results in a laggy feeling compared to second gear (DS also starts in first).
The cure: PUNCH IT AND IT GOES MUCH BETTER!

tx330i · 08-05-2006, 09:04 PM

I feel it in DS also. I'm getting more use to it as I drive it more.

ex-poster · 08-05-2006, 10:18 PM

Quote:

Originally Posted by xG35c

I have a feeling this lag or hesitation that everyone thinks they're experiencing is...FIRST GEAR!

Gentle acceleration from a stop briefly uses the Step's very short first gear which results in a laggy feeling compared to second gear (DS also starts in first).
The cure: PUNCH IT AND IT GOES MUCH BETTER!

No.

I've had my car for 13 months now, I know how it reacts in most situations now.

I'm thinking this real problem was a function of the stupid high temps (104 3 days in a row in Chicago here) and AC being on max...

Bavaria330 · 08-07-2006, 10:40 AM

I've Got the 6 spd and I noticed right away.
this is unacceptable, I'm hoping is caused by inferior gas put there by the dealer.

bavarian19 · 08-07-2006, 11:17 AM

Quote:

Originally Posted by xG35c

I have a feeling this lag or hesitation that everyone thinks they're experiencing is...FIRST GEAR!

Gentle acceleration from a stop briefly uses the Step's very short first gear which results in a laggy feeling compared to second gear (DS also starts in first).
The cure: PUNCH IT AND IT GOES MUCH BETTER!

Its not that. as I have stated 1 billion times in this thread, I have a manual, and still experience the problem.

It has nothing to do with the transmission!!! This is simply just the response (even in neutral) from your input on the gas pedal to the engines reaction. There is about a half second delay, which is especially unacceptable driving a manual transmission...

Ghunger · 08-07-2006, 12:54 PM

I can't say I've felt any sort of delay between the time I touch the throttle pedal and the time the revs change. Seems like a very odd problem though. You can see my options in my sig below, and my car is about 4 months old with 4.5k miles on it. Hope you guys find a solution though, I can imagine that would be very annoying.

GregL · 08-08-2006, 11:51 AM

I used to complain to Mercedes about this all the time before I became disillusioned with their latest entries and converted to BMW's. Like others have stated before it's a pretty good chance that it's the electronic throttle thinking about how to react before moving the car. I've never had this problem with my Nissans and Infinitis over the years that operated on a throttle cable. But then again I haven't experienced a delay with the drive by wire throttle on the latest Japanese cars either... so in my severely limited knowledge I don't think it's a technological limitation/constraint.

whippersnapper · 08-08-2006, 01:04 PM

Picked up my car yesterday and yes it is a pain in the ass. It must be the non linear calibration of the fly by wire throttle. The only solution appears to be to train yourself to apply a lot more throttle than your brain says is necessary to move off smoothly.

330m · 08-08-2006, 03:57 PM

It must be some US emissions stuff.

My 330i has lightning throttle response, even in our recent UK heatwave (100def F and 90% RH) a quick flick on the gas will see the revs fly to 4-5k. Two quick stabs and you be on the limiter.

I find FBW throttles much sharper than cable butterflies as they map them to feel 'extra sharp' as it makes the car feel quicker. (had A3, A4, Golf V6 with FBW)

gpi · 08-08-2006, 06:38 PM

Here is what I've noticed with my .5 second delay. (Auto Transmission)
Although I'm well aware of the Hill Assist feature, I think the "delay problem" is related to it.

On level ground, from a full stop with my foot on the brake and then quickly switching to the gas pedal, I'll notice the delay.

If I take my foot off the brake so that the car will just start to roll, and then pressing the gas pedal quickly, I'll have no delay at all.

It's almost like the Hill assist feature is always active, EVEN on level ground.

Anyone else want to test this theory?
Thanks

330m · 08-09-2006, 02:50 AM

I looked at this before, the hill start on a manual IS active on any surface, including level ground. But as the brakes are released as you lift the clutch you never notice on flat ground because the car wouldn't roll with or without brakes on anyway. A car will roll on a very slight incline, so it would be impossible to detect this slope as the vehicle angle could easily be produced by loading in the trunk for example.

If the assist is always on with an auto, it can't use the clutch pedal as a signal to release the brakes, so it must use the throttle application. In drive do the steptronics 'creep' on level ground as soon as you release the brake, or is there a delay??

However, people here say they have the delay on manual cars (mine doesn't have it) so maybe it is a different issue to the auto.

RGB · 08-09-2006, 05:02 AM

My 325i Steptronic has only 1000 kms. but from the beggining I felt a strange "softness" of response when starting from a stop.

Latter I realised that the car actually started in 2th gear and if I floored the pedal it changed to 1rst gear; of course all this gear changing takes some time.

I have not tried it in DS mode, but I am almost sure that in that way it will start in 1rst gear.

wvtlo · 08-09-2006, 06:22 AM

http://www.e90post.com/forums/showthread.php?t=21445

gpi · 08-09-2006, 09:47 AM

Just to further clarify with my auto trans. When I have my car in "D" and then take my foot off the brake, the car will start to move (as it should). Only then I do NOT have the delay problem if I floor it.

If I try to do a jack rabbit start, before it gets a chance to slightly move, I'll have this delay.

Would someone like to see if their E90 is similar as to the above.

It's almost like, the car HAS to move before we can floor it without the hesitation.
Now, other E90POsters from Australia have noticed no delay, so I would think it is not a flaw but invoked for some other reason.

08-05-2006, 12:34 AM	#24
adr Handy Armani 11 Rep 59 Posts Drives: Honds Element Join Date: Jan 2006 Location: Pasadena, CA iTrader: (2) Garage List 2006 325i [0.00]	I doubt that the carbon filter can provide any air quality management. When I took out the carbon from my 6 months old car, 80% of carbon did not sizzle when it was first wetted, which means that most of the carbon in the filter were not active/viable. So I don't think the carbon filter can leach fumes as BMW would suggest. Considering the carbon filter is relatively thick and not quite flow free, I guess it may be a resistance to the efficiency of air flow. (Which may affect the throttle response.)
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08-05-2006, 01:20 AM	#25
SRT Second Lieutenant 12 Rep 297 Posts Drives: BMW 5 Series Join Date: Sep 2005 Location: London, UK iTrader: (0)	The carbon filter could be the issue - might be the fuel octane rating too
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08-05-2006, 05:11 PM	#28
Sekiray New Member 4 Rep 16 Posts Drives: 330I Join Date: Aug 2006 Location: San Mateo iTrader: (0)	yea its annoying... does the DS mode really solve the problem?
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08-05-2006, 08:38 PM	#31
xG35c Lieutenant 46 Rep 433 Posts Drives: 330i Join Date: Aug 2006 Location: NJ iTrader: (0)	I have a feeling this lag or hesitation that everyone thinks they're experiencing is...FIRST GEAR! Gentle acceleration from a stop briefly uses the Step's very short first gear which results in a laggy feeling compared to second gear (DS also starts in first). The cure: PUNCH IT AND IT GOES MUCH BETTER!
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08-05-2006, 09:04 PM	#32
tx330i Private 5 Rep 59 Posts Drives: 2006 BMW 330i Join Date: Jul 2006 Location: Katy, TX iTrader: (1)	I feel it in DS also. I'm getting more use to it as I drive it more. __________________ '06 330i Alpine White
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08-07-2006, 10:40 AM	#34
Bavaria330 First Lieutenant 57 Rep 321 Posts Drives: 335i LCI AW Join Date: Jun 2006 Location: LB Cali. iTrader: (2)	I've Got the 6 spd and I noticed right away. this is unacceptable, I'm hoping is caused by inferior gas put there by the dealer.
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08-07-2006, 12:54 PM	#36
Ghunger Major 63 Rep 1,024 Posts Drives: 330i Join Date: Sep 2005 Location: Seattle, WA iTrader: (0)	I can't say I've felt any sort of delay between the time I touch the throttle pedal and the time the revs change. Seems like a very odd problem though. You can see my options in my sig below, and my car is about 4 months old with 4.5k miles on it. Hope you guys find a solution though, I can imagine that would be very annoying. __________________ 330i Monaco Blue, Terra /w aluminum trim, SP, PP, CA, PDC, Nav, Folding Seats, Sat Prep European Delivery Blog Picture Gallery
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08-08-2006, 11:51 AM	#37
GregL Brigadier General 109 Rep 3,618 Posts Drives: 2016 CLA45 AMG Join Date: Nov 2005 Location: GTA iTrader: (4)	I used to complain to Mercedes about this all the time before I became disillusioned with their latest entries and converted to BMW's. Like others have stated before it's a pretty good chance that it's the electronic throttle thinking about how to react before moving the car. I've never had this problem with my Nissans and Infinitis over the years that operated on a throttle cable. But then again I haven't experienced a delay with the drive by wire throttle on the latest Japanese cars either... so in my severely limited knowledge I don't think it's a technological limitation/constraint. __________________ 2016 Mercedes-AMG CLA45 2013 Mercedes-Benz B250 - Gone 2010 Mercedes-Benz C350 4Matic - Gone 2006 BMW 330xi - Gone 2001 Infiniti QX4 - Gone
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08-08-2006, 01:04 PM	#38
whippersnapper Captain 26 Rep 972 Posts Drives: people mad Join Date: Jun 2006 Location: Atlanta iTrader: (0) Garage List 2006 BMW 325i [0.00] 2006 BMW 325i [0.00]	Picked up my car yesterday and yes it is a pain in the ass. It must be the non linear calibration of the fly by wire throttle. The only solution appears to be to train yourself to apply a lot more throttle than your brain says is necessary to move off smoothly. __________________ __________________________________________________ __________________ 2006 BMW 325i, Jet Black, 6MT, ZSP, Black Leather, Aluminum, Power Seats, Logic 7
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08-08-2006, 03:57 PM	#39
330m First Lieutenant 8 Rep 364 Posts Drives: 330i Join Date: Feb 2006 Location: Manchester iTrader: (0)	It must be some US emissions stuff. My 330i has lightning throttle response, even in our recent UK heatwave (100def F and 90% RH) a quick flick on the gas will see the revs fly to 4-5k. Two quick stabs and you be on the limiter. I find FBW throttles much sharper than cable butterflies as they map them to feel 'extra sharp' as it makes the car feel quicker. (had A3, A4, Golf V6 with FBW) __________________ *330i M-sport* SG + black leather :rocks: Last edited by 330m; 08-09-2006 at 02:54 AM..
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08-08-2006, 06:38 PM	#40
gpi Enlisted Member 6 Rep 47 Posts Drives: NA Join Date: Nov 2005 Location: Calgary iTrader: (0)	Here is what I've noticed with my .5 second delay. (Auto Transmission) Although I'm well aware of the Hill Assist feature, I think the "delay problem" is related to it. On level ground, from a full stop with my foot on the brake and then quickly switching to the gas pedal, I'll notice the delay. If I take my foot off the brake so that the car will just start to roll, and then pressing the gas pedal quickly, I'll have no delay at all. It's almost like the Hill assist feature is always active, EVEN on level ground. Anyone else want to test this theory? Thanks
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08-09-2006, 02:50 AM	#41
330m First Lieutenant 8 Rep 364 Posts Drives: 330i Join Date: Feb 2006 Location: Manchester iTrader: (0)	I looked at this before, the hill start on a manual IS active on any surface, including level ground. But as the brakes are released as you lift the clutch you never notice on flat ground because the car wouldn't roll with or without brakes on anyway. A car will roll on a very slight incline, so it would be impossible to detect this slope as the vehicle angle could easily be produced by loading in the trunk for example. If the assist is always on with an auto, it can't use the clutch pedal as a signal to release the brakes, so it must use the throttle application. In drive do the steptronics 'creep' on level ground as soon as you release the brake, or is there a delay?? However, people here say they have the delay on manual cars (mine doesn't have it) so maybe it is a different issue to the auto. __________________ *330i M-sport* SG + black leather :rocks:
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08-09-2006, 05:02 AM	#42
RGB Private First Class 9 Rep 178 Posts Drives: 325i Auto.Active Steering Join Date: May 2005 Location: Sevilla Spain iTrader: (0)	My 325i Steptronic has only 1000 kms. but from the beggining I felt a strange "softness" of response when starting from a stop. Latter I realised that the car actually started in 2th gear and if I floored the pedal it changed to 1rst gear; of course all this gear changing takes some time. I have not tried it in DS mode, but I am almost sure that in that way it will start in 1rst gear.
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08-09-2006, 06:22 AM	#43
wvtlo Private 17 Rep 80 Posts Drives: 2003 Z4 Join Date: Apr 2006 Location: Suburbs of Philly, PA iTrader: (0)	http://www.e90post.com/forums/showthread.php?t=21445 __________________ 2006 325xi \| SGM :: SOLD 2003 Z4 \| TiAG
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08-09-2006, 09:47 AM	#44
gpi Enlisted Member 6 Rep 47 Posts Drives: NA Join Date: Nov 2005 Location: Calgary iTrader: (0)	Just to further clarify with my auto trans. When I have my car in "D" and then take my foot off the brake, the car will start to move (as it should). Only then I do NOT have the delay problem if I floor it. If I try to do a jack rabbit start, before it gets a chance to slightly move, I'll have this delay. Would someone like to see if their E90 is similar as to the above. It's almost like, the car HAS to move before we can floor it without the hesitation. Now, other E90POsters from Australia have noticed no delay, so I would think it is not a flaw but invoked for some other reason.
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