How to make your ASS wait

Kev314 · 09-01-2015, 06:38 PM

From page 21 of the F30 Powertrain "Technical training" document:

"1. Vehicle slows to standstill, e.g., at a red light
2. Immediately after the vehicle comes to a standstill (within one second) the brake pedal is pressed briefly, applying more force than usual, then immediately held with the usual brake pedal force
3. The engine continues running"

The problem is that more often than not the engine shuts down immediately instead of waiting ~ 1 second so there is no opportunity to forestall shutdown.

Is there some secret to making the ASS wait - perhaps having to do with the deceleration profile? I haven't noticed any pattern; it seems to wait or not wait at random.

This is with an automatic trans.

Heel328 · 09-01-2015, 07:21 PM

It won't cut OFF if you hold the clutch in.

I turn mine OFF though.

Kev314 · 09-01-2015, 07:30 PM

Quote:

Originally Posted by Heel328

It won't cut OFF if you hold the clutch in.

I turn mine OFF though.

I should have said that mine is an automatic (now added to original post). thanks

greekcs · 09-01-2015, 08:13 PM

Unless you're planning on getting rid of the car in a few years i'd advise against using ASS at all.

Rautha · 09-01-2015, 08:52 PM

Easy way is this....

I don't mind ASS -- most of the time. However if I know I am approaching a red light that will be changing soon or just stopping for a sec to make a turn and i don't want an engine shut down, i just flick the gearshift from "D" to "S". In "S" ASS will not engage and engine won't shut down. Once I get moving again, simply flick back into "D"

iconoclast · 09-01-2015, 08:57 PM

Quote:

Originally Posted by greekcs

Unless you're planning on getting rid of the car in a few years i'd advise against using ASS at all.

why?

x5mad · 09-02-2015, 03:36 AM

Quote:

Originally Posted by Rautha

Easy way is this....

I don't mind ASS -- most of the time. However if I know I am approaching a red light that will be changing soon or just stopping for a sec to make a turn and i don't want an engine shut down, i just flick the gearshift from "D" to "S". In "S" ASS will not engage and engine won't shut down. Once I get moving again, simply flick back into "D"

This

Kev314 · 09-02-2015, 06:31 AM

Quote:

Originally Posted by Rautha

Easy way is this....

I don't mind ASS -- most of the time. However if I know I am approaching a red light that will be changing soon or just stopping for a sec to make a turn and i don't want an engine shut down, i just flick the gearshift from "D" to "S". In "S" ASS will not engage and engine won't shut down. Once I get moving again, simply flick back into "D"

I'll try the D to S method, but still wonder why the ~ 1 second pause only occurs some of the time.

spuntyb · 09-02-2015, 06:50 AM

Quote:

Originally Posted by greekcs

Unless you're planning on getting rid of the car in a few years i'd advise against using ASS at all.

+1

Fuel savings for me in mostly city driving in the first 10k miles was nominal at best, and the actual use was annoying at worst. The balance of the two made it not worth it for me, so now mine is shut off for good.

maverick83 · 09-02-2015, 07:36 AM

The car will based on the timing know where exactly to stop the engine to ensure a quick restart - at least what I read in a motoring magazine a while ago.

LMK5 · 09-02-2015, 09:33 AM

Quote:

Originally Posted by spuntyb

+1

Fuel savings for me in mostly city driving in the first 10k miles was nominal at best, and the actual use was annoying at worst. The balance of the two made it not worth it for me, so now mine is shut off for good.

Same here. I do notice an increase in mileage in the city when using it, but the loss of refinement just isn't worth it. They've got a long way to go to smooth out ASS.

m_alnimah · 09-02-2015, 09:49 AM

The title is pretty funny though,

"How to make your ASS wait"

Thumper333 · 09-02-2015, 10:01 AM

Quote:

Originally Posted by LMK5

Same here. I do notice an increase in mileage in the city when using it, but the loss of refinement just isn't worth it. They've got a long way to go to smooth out ASS.

I agree that they have a lot of room in the refinement range................but see no reason to not take advantage of the benefits now anyway.

In my '14 Q5 TDI you couldn't even tell when the engine shut off unless you were the driver or were paying close attention on purpose. Startup when leaving a stop was so smooth you only noticed based on the engine noise returning.

My F31 shuts off the engine before the car is stopped, jerking it to a halt and restart is a noticeable vibrating start up.

But getting over 30MPG in stop and go city driving in a 4000lb AWD wagon is awesome enough that I can deal with this lack of refinement, and push for BMW to continue improving the system.

Quote:

Originally Posted by m_alnimah

The title is pretty funny though,

"How to make your ASS wait"

LMAO

Kev314 · 09-02-2015, 10:26 AM

[QUOTE=Thumper333;18517891]I agree that they have a lot of room in the refinement range................but see no reason to not take advantage of the benefits now anyway.

In my '14 Q5 TDI you couldn't even tell when the engine shut off unless you were the driver or were paying close attention on purpose. Startup when leaving a stop was so smooth you only noticed based on the engine noise returning.

My F31 shuts off the engine before the car is stopped, jerking it to a halt and restart is a noticeable vibrating start up.

But getting over 30MPG in stop and go city driving in a 4000lb AWD wagon is awesome enough that I can deal with this lack of refinement, and push for BMW to continue improving the system.
--------------------------------
My '014 328 xdrive doesn't jerk to a stop, but the engine does stop suddenly typically without providing the 1 second pause. Upon start up there is sometimes a vibe but often it is pretty smooth even though you can hear the starter motor doing its work, however briefly. Hard to know what's "real" and what's individual perception.

canukgtp · 09-02-2015, 11:38 AM

yeah I find my system works well...only stops when the car is completely stopped and generally comes back on smoothly...the occasional start is shaky probably depending on where the car stopped in the cycle

Kev314 · 09-02-2015, 03:32 PM

Quote:

Originally Posted by m_alnimah

The title is pretty funny though,

"How to make your ASS wait"

Wonder what ASS would be in German? You would think they would check the English translation of the complete term as well as its acronym.

Decades ago my high school German teacher told of a marketing campaign in post war Germany. An American consumer products company had a spray on type deodorant that they wanted to introduce into West Germany. The bill boards were already up before someone realized that the product name, Mist, means manure. I suppose there are many stories like that.

Thumper333 · 09-02-2015, 06:03 PM

Quote:

Originally Posted by Kev314

My '014 328 xdrive doesn't jerk to a stop, but the engine does stop suddenly typically without providing the 1 second pause. Upon start up there is sometimes a vibe but often it is pretty smooth even though you can hear the starter motor doing its work, however briefly. Hard to know what's "real" and what's individual perception.

Might be the system is better in a gas motor, but again my comparison was from an Audi TDI to a BMW diesel.

And I assure you, the jerk to a stop is real.

I plan to have the dealer look into it at it's first service.

CLittle · 09-02-2015, 09:46 PM

I press the brake pedal all the way down and then let a little pressure off to make my ASS wait all the time. Great for stop signs, right turns on red and when you know the light is about to turn green anyways.

When coming to a stop, make sure you don't bottom out the brake pedal, leave a little play for additional pedal application. When your vehicle is at a full stop, keep depressing the brake pedal until it's bottomed out, then let up a little pressure.

Heel328 · 09-02-2015, 10:53 PM

Sounds excessive, maxing out the brakes like that and bottoming them out at every turn.

I turn ASS OFF, but at least with a clutch you can keep your foot down to avoid ASS, or mashing brakes.

RIOBLAST · 09-03-2015, 08:03 AM

When I tried the new 318d (150hk) I noticed less ASS shaking.

Thumper333 · 09-03-2015, 02:47 PM

Quote:

Originally Posted by CLittle

When coming to a stop, make sure you don't bottom out the brake pedal, leave a little play for additional pedal application. When your vehicle is at a full stop, keep depressing the brake pedal until it's bottomed out, then let up a little pressure.

I rarely use full brake force, I like to bring the car to a smooth, slow stop. Outside of a panic stop, I never bottom the pedal out.

The ASS system still engages when I still have only a very light pressure on the pedal....and the car is still moving. This results in very jerky stops. In short, it is impossible for me to do what you describe as the car is off before it stops even moving. LOL

Kev314 · 09-03-2015, 04:01 PM

Quote:

Originally Posted by CLittle

When coming to a stop, make sure you don't bottom out the brake pedal, leave a little play for additional pedal application. When your vehicle is at a full stop, keep depressing the brake pedal until it's bottomed out, then let up a little pressure.

I tried this method today several times but no luck. When the car stops rolling the engine shuts off instantaneously unless I get the ~ 1 sec delay. Also tried econ vs comfort but no difference.

I think there is a bug in the system & will just have to work around it or risk the dealer messing things up trying to fix it.

09-01-2015, 06:38 PM	#1
Kev314 Private First Class 44 Rep 143 Posts Drives: 2014 328 xdrive Join Date: Jan 2015 Location: Massachusetts iTrader: (0)	How to make your ASS wait From page 21 of the F30 Powertrain "Technical training" document: "1. Vehicle slows to standstill, e.g., at a red light 2. Immediately after the vehicle comes to a standstill (within one second) the brake pedal is pressed briefly, applying more force than usual, then immediately held with the usual brake pedal force 3. The engine continues running" The problem is that more often than not the engine shuts down immediately instead of waiting ~ 1 second so there is no opportunity to forestall shutdown. Is there some secret to making the ASS wait - perhaps having to do with the deceleration profile? I haven't noticed any pattern; it seems to wait or not wait at random. This is with an automatic trans. Last edited by Kev314; 09-01-2015 at 07:29 PM.. Reason: Additional info
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09-01-2015, 07:21 PM	#2
Heel328 First Lieutenant 79 Rep 369 Posts Drives: 2013 328i 6MT Join Date: Mar 2015 Location: Carolina iTrader: (0)	It won't cut OFF if you hold the clutch in. I turn mine OFF though. __________________ 2013 328i 6MT 1995 S6* 1993 S4* 1984 944* 1988 16V GTI*
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09-01-2015, 08:13 PM	#4
greekcs Major 773 Rep 1,113 Posts Drives: 2020 M340i xDrive Join Date: Jan 2010 Location: Long Island, NY iTrader: (0)	Unless you're planning on getting rid of the car in a few years i'd advise against using ASS at all. __________________ 2003 11/02 Steel Gray Metallic on Red M3 - SMGII - VF570 - SUPERSPRINT - KW - BBS - CSL ROOF SOLD 2015 09/14 Alpine White on Red 435i xDrive MPPK - Expensive black vinyl with special lettering. SOLD 2020 12/19 Mineral Gray Metallic on Black Vinyl interior M340i xDrive
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09-01-2015, 08:52 PM	#5
Rautha Private 13 Rep 84 Posts Drives: 2014 328ixDrive touring Join Date: Feb 2014 Location: MA iTrader: (0)	Easy way is this.... I don't mind ASS -- most of the time. However if I know I am approaching a red light that will be changing soon or just stopping for a sec to make a turn and i don't want an engine shut down, i just flick the gearshift from "D" to "S". In "S" ASS will not engage and engine won't shut down. Once I get moving again, simply flick back into "D"
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09-02-2015, 07:36 AM	#10
maverick83 Second Lieutenant 84 Rep 294 Posts Drives: F20 M135i Join Date: Jan 2013 Location: Surrey iTrader: (0)	The car will based on the timing know where exactly to stop the engine to ensure a quick restart - at least what I read in a motoring magazine a while ago.
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09-02-2015, 09:49 AM	#12
m_alnimah Lieutenant 70 Rep 473 Posts Drives: 2016 Mini Cooper S 5 Door Join Date: Aug 2014 Location: Doha, Qatar iTrader: (0) Garage List 2015 BMW X5 [10.00]	The title is pretty funny though, "How to make your ASS wait" __________________ 2015 X5 xDrive35i M Sport, Black Sapphire on Terra Dakota Leather, Lane Change Warning, Lighting Package, 6WB, ConnectedDrive Services... (Sold) 2016 Mini Cooper S 5 Door Fully Equipped. (Sold) 2016 Audi A6 35 TFSI 2017 X6 xDrive50i Pure Extravagance, Space Grey on Coral Red, Fully Equipped.
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09-02-2015, 10:26 AM	#14
Kev314 Private First Class 44 Rep 143 Posts Drives: 2014 328 xdrive Join Date: Jan 2015 Location: Massachusetts iTrader: (0)	[QUOTE=Thumper333;18517891]I agree that they have a lot of room in the refinement range................but see no reason to not take advantage of the benefits now anyway. In my '14 Q5 TDI you couldn't even tell when the engine shut off unless you were the driver or were paying close attention on purpose. Startup when leaving a stop was so smooth you only noticed based on the engine noise returning. My F31 shuts off the engine before the car is stopped, jerking it to a halt and restart is a noticeable vibrating start up. But getting over 30MPG in stop and go city driving in a 4000lb AWD wagon is awesome enough that I can deal with this lack of refinement, and push for BMW to continue improving the system. -------------------------------- My '014 328 xdrive doesn't jerk to a stop, but the engine does stop suddenly typically without providing the 1 second pause. Upon start up there is sometimes a vibe but often it is pretty smooth even though you can hear the starter motor doing its work, however briefly. Hard to know what's "real" and what's individual perception.
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09-02-2015, 11:38 AM	#15
canukgtp First Lieutenant 107 Rep 333 Posts Drives: 2018 M3 Join Date: Jun 2013 Location: New-Brunswick iTrader: (0)	yeah I find my system works well...only stops when the car is completely stopped and generally comes back on smoothly...the occasional start is shaky probably depending on where the car stopped in the cycle __________________ 2018 F80 M3 6MT (current) 2014 F31 328i Touring (sold) 2008 E92 M3 6MT (sold) 2011 E90 335xi (lease up)
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09-02-2015, 09:46 PM	#18
CLittle Second Lieutenant 16 Rep 247 Posts Drives: 2013 328i Luxury Join Date: Apr 2013 Location: Irvine, CA iTrader: (0)	I press the brake pedal all the way down and then let a little pressure off to make my ASS wait all the time. Great for stop signs, right turns on red and when you know the light is about to turn green anyways. When coming to a stop, make sure you don't bottom out the brake pedal, leave a little play for additional pedal application. When your vehicle is at a full stop, keep depressing the brake pedal until it's bottomed out, then let up a little pressure.
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09-02-2015, 10:53 PM	#19
Heel328 First Lieutenant 79 Rep 369 Posts Drives: 2013 328i 6MT Join Date: Mar 2015 Location: Carolina iTrader: (0)	Sounds excessive, maxing out the brakes like that and bottoming them out at every turn. I turn ASS OFF, but at least with a clutch you can keep your foot down to avoid ASS, or mashing brakes. __________________ 2013 328i 6MT 1995 S6* 1993 S4* 1984 944* 1988 16V GTI*
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09-03-2015, 08:03 AM	#20
RIOBLAST Private First Class 34 Rep 169 Posts Drives: 330xi G21 ELSD Join Date: Jun 2013 Location: Trollhättan iTrader: (0)	When I tried the new 318d (150hk) I noticed less ASS shaking.
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