Hard Brake Pedal at Cold Start????

Rekla · 12-28-2008, 09:42 AM

After I reset the automatic transmission using the procedure below, my car has a hard brake pedal upon cold starts. At warm starts, the brake pedal is "soft" and can be pressed before starting the car - like it always was. At cold starts however (usually 1st start of the day), the brake pedal cannot be pressed in - it feels hard, to start the engine I press it with my foot and start the car, the car starts and the pedal softens (can be pressed down, normal feeling). Any body has a clue what caused it and how to get it back to normal?

http://www.e90post.com/forums/showth...=gearbox+reset

"1. Turn cars electronics on-push start button once or twice without turning the actual engine on.
2.Hold the gas pedal to the floor for 25 seconds
3. Most times you will hear the gearbox resetting itself and hear some "noise" coming from your car but not always noticable so dont worry if you dont
4 Now start your car and enjoy the gearbox reset to its factor settings and open for all new learning. The shifts are silky smooth again and shift points shift faster-basically it totally makes your tranny perform better. "

itsbrokeagain · 12-28-2008, 10:07 AM

its called vacuum assist. It bleeds out over night, or if you pump the pedal multiple times with the car off, you will bleed the vacuum from the booster. Restarting the car will restore it.

Normal operation.

hipnotic · 12-31-2008, 07:31 PM

that is very normal

Rekla · 01-01-2009, 09:55 AM

I don't recall experiencing it before I did the AT reset. So both of you are saying you have it to upon cold engine starts? It has always been there?

danniexi · 01-01-2009, 02:10 PM

Quote:

Originally Posted by Rekla

I don't recall experiencing it before I did the AT reset. So both of you are saying you have it to upon cold engine starts? It has always been there?

It's always been there for me. It's completely normal. Nothing to worry about.

cn555ic · 01-01-2009, 07:58 PM

Its completely normal like other stated.

Placey · 01-02-2009, 08:18 AM

Theres an old bulletin on this, updated valve going to the booster.

raceyBMW · 01-04-2009, 03:44 AM

Here is the bulletin
http://www.bmwtis.com/tsb/bulletins/...p/B340607g.htm

flicks28 · 01-10-2009, 11:04 PM

Quote:

Originally Posted by raceyBMW

Here is the bulletin
http://www.bmwtis.com/tsb/bulletins/...p/B340607g.htm

+1 Ive been looking for this.

I only get this problem in colder weather. Spring-Fall its never an issue.

Rekla · 01-11-2009, 09:41 AM

Thanks guys. I'll mention this bulletin next time I go in for maintenance.

Brake · 06-01-2011, 07:34 PM

When I drove out of my basement garage in the morning, my brake did not work. It feelt extremely hard as I pushed down, but did not actually stop the car. It eventually worked after pumping the brake around 10 times. (Thankfully I was at the speed of 10KMH, so I didn't crash) After that, the brakes worked perfectly the rest of the day (about 50 kms of driving). The exact same thing has happened for two consecutive days now. Anyone have any ideas on what it could be? Car is a Nissan Altima 2001 with around 200,000 KM on it.

mr_milo · 06-01-2011, 08:01 PM

Quote:

Originally Posted by Brake

Car is a Nissan Altima 2001 with around 200,000 KM on it.

When was the last time you had the brake fluid changed? I would start this that and make sure to flush and bleed all of the brake lines.

Built My Way · 10-07-2011, 04:39 AM

Go to this link...
http://www.e90post.com/forums/showthread.php?t=589753

M BROK3 · 10-07-2011, 05:44 AM

It's called morning wood

12-28-2008, 09:42 AM	#1
Rekla Hug the road... Carpe Asphalt 105 Rep 722 Posts Drives: 2007 ///M Coupe Join Date: Sep 2006 Location: Central Coast, CA iTrader: (20)	Hard Brake Pedal at Cold Start???? After I reset the automatic transmission using the procedure below, my car has a hard brake pedal upon cold starts. At warm starts, the brake pedal is "soft" and can be pressed before starting the car - like it always was. At cold starts however (usually 1st start of the day), the brake pedal cannot be pressed in - it feels hard, to start the engine I press it with my foot and start the car, the car starts and the pedal softens (can be pressed down, normal feeling). Any body has a clue what caused it and how to get it back to normal? http://www.e90post.com/forums/showth...=gearbox+reset "1. Turn cars electronics on-push start button once or twice without turning the actual engine on. 2.Hold the gas pedal to the floor for 25 seconds 3. Most times you will hear the gearbox resetting itself and hear some "noise" coming from your car but not always noticable so dont worry if you dont 4 Now start your car and enjoy the gearbox reset to its factor settings and open for all new learning. The shifts are silky smooth again and shift points shift faster-basically it totally makes your tranny perform better. " __________________ 2007 BMW ///M Coupe
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12-28-2008, 10:07 AM	#2
itsbrokeagain 310 Rep 15,745 Posts Drives: 1999 528iT, E53 X5, E46 325xi Join Date: Mar 2007 Location: Strong Island iTrader: (7)	its called vacuum assist. It bleeds out over night, or if you pump the pedal multiple times with the car off, you will bleed the vacuum from the booster. Restarting the car will restore it. Normal operation.
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12-31-2008, 07:31 PM	#3
hipnotic Major General 149 Rep 6,604 Posts Drives: e92 335i Join Date: Oct 2007 Location: So. Cal iTrader: (7) Garage List 2008 335i coupe [7.00]	that is very normal
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01-01-2009, 09:55 AM	#4
Rekla Hug the road... Carpe Asphalt 105 Rep 722 Posts Drives: 2007 ///M Coupe Join Date: Sep 2006 Location: Central Coast, CA iTrader: (20)	I don't recall experiencing it before I did the AT reset. So both of you are saying you have it to upon cold engine starts? It has always been there? __________________ 2007 BMW ///M Coupe
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01-01-2009, 07:58 PM	#6
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Its completely normal like other stated.
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01-02-2009, 08:18 AM	#7
Placey First Lieutenant 15 Rep 367 Posts Drives: 08 Z4 3.0SI Join Date: Feb 2007 Location: Upstate New York iTrader: (1)	Theres an old bulletin on this, updated valve going to the booster. __________________ 08 Z4 3.0SI Black Sapphire/Black Int, 6sp, Sport/Premium --- retired --- 2010 BMW 650GS -- Z4 replacement Working with the most talented people on the most technically advanced automobiles....
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01-04-2009, 03:44 AM	#8
raceyBMW king of the hills 92 Rep 2,915 Posts Drives: 2011 M3 w/ESS55, 2001 540i/6 Join Date: Dec 2006 Location: Arvada, CO iTrader: (1) Garage List 2001 BMW 540i/6 [8.17] 1994 530i [9.00] 2007 335i Coupe [8.37]	Here is the bulletin http://www.bmwtis.com/tsb/bulletins/...p/B340607g.htm
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01-11-2009, 09:41 AM	#10
Rekla Hug the road... Carpe Asphalt 105 Rep 722 Posts Drives: 2007 ///M Coupe Join Date: Sep 2006 Location: Central Coast, CA iTrader: (20)	Thanks guys. I'll mention this bulletin next time I go in for maintenance. __________________ 2007 BMW ///M Coupe
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06-01-2011, 07:34 PM	#11
Brake Registered 0 Rep 1 Posts Drives: Altima Join Date: Jun 2011 Location: Canada iTrader: (0)	Brakes not working....occasionally When I drove out of my basement garage in the morning, my brake did not work. It feelt extremely hard as I pushed down, but did not actually stop the car. It eventually worked after pumping the brake around 10 times. (Thankfully I was at the speed of 10KMH, so I didn't crash) After that, the brakes worked perfectly the rest of the day (about 50 kms of driving). The exact same thing has happened for two consecutive days now. Anyone have any ideas on what it could be? Car is a Nissan Altima 2001 with around 200,000 KM on it.
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10-07-2011, 04:39 AM	#13
Built My Way Captain 71 Rep 628 Posts Drives: ...when not replacing gaskets Join Date: Apr 2011 Location: Friendly Maritimes ;) iTrader: (0) Garage List 2007 BMW 335i e90 [7.50]	Go to this link... http://www.e90post.com/forums/showthread.php?t=589753
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10-07-2011, 05:44 AM	#14
M BROK3 Major 101 Rep 1,036 Posts Drives: F95 , G80 M3, F80 M3, E92 M3 Join Date: Jan 2011 Location: NY/NJ iTrader: (13)	It's called morning wood
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