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      03-07-2013, 01:46 PM   #1
loukas135
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TBA (Throttle Body Adaptation) RESET - solution to Throttle Lag

For those of you who have noticed a 5-10 % throttle lag ( not turbo lag ) when accelerating, there is a "cure" which curiously was not known by my BMW dealership ... I made some searchs on different boards and this is what I have found. They call it the TBA reset:

- Put the power on but do not start the engine.
- Floor the throttle for 30-60 seconds
- Keep the throttle to the floor and put the power OFF
- Release the throttle and wait 2 minutes.

During the 2 minutes you should feel or hear some kind of mechanical sound.

That should tell you the reset is complete.

Start the car and go notice that the "lag" is gone. The first 5 - 10 % is now engaging the transmission.

I've done it on my X1 and on the X3 of a friend.

Better this way.

Let me know how that work for you please ...

This should work for any Auto Tranny ( 1 series, 3 series, 5, X1, X3 ... ).

Have a nice day !
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      03-07-2013, 03:25 PM   #2
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Quote:
Originally Posted by loukas135 View Post
They call it the TBA reset:

- Put the power on but do not start the engine.
- Floor the throttle for 30-60 seconds
- Keep the throttle to the floor and put the power OFF
- Release the throttle and wait 2 minutes.
When I did test drive a X1 sDrive, I did not notice the throttle delay issue, probably because of short drive. But, in the evening when I picked up my X1 xDrive, I noticed a serious throttle delay on my car in every stop sign: it seems that pushing the gas paddle for the first inch, the transmission does not engage. I found the TBA reset (from another thread) and did the reset procedure. Now, the throttle delay is not obvious at stop sign.
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      03-07-2013, 05:07 PM   #3
loukas135
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Glad to hear it ... What is sad though is that we both had to found it on some forums instead of having the issue solved by the dealership which I'm sure you brought the issue too ...

I have talked to my favorite reps and he told me this procedure was not given to them by BMW How in the world could they be unaware of this procedure ?

I can't imagine this procedure coming from anywhere else than BMW so ... What's the problem letting dealers know how the reset the TBA ?

Or maybe my reps was just giving me some crap in a way to avoid being throw under the bus ... Anyway, this is why those Forums are so important to all of us who are passionate about cars ...

Thank's for your reply by the way ...
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      03-08-2013, 12:12 AM   #4
bill1963
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Do you have to do this every time before you drive? Or is this a one time only thing?
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      03-08-2013, 01:35 AM   #5
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I read somewhere that this method resets the adaptive drive of the transmission.
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      03-08-2013, 03:08 AM   #6
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Quote:
Originally Posted by bill1963 View Post
Do you have to do this every time before you drive? Or is this a one time only thing?
Some people said that the TBA reset needs redo every a few weeks. But, I just did once a month ago. It still drives ok. At a stop sign or red light, if I press the gas paddle, I can feel the transmission immediately engaged. But frankly speaking, for the first 5-10 yard my car (X1 XDrive28i) performs just like an average car and does not feel fast enough. But, after 10 yard, it become a different car and can beat most of cars.
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      03-08-2013, 05:56 AM   #7
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Quote:
Originally Posted by Teemo Panda
I read somewhere that this method resets the adaptive drive of the transmission.
No, that is done @ dealership and is a separate thing.
This, in conjunction with the above throttle-body adaptation reset, should get rid of a good portion of lag (and keeping it in DS for good measure).
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      03-08-2013, 08:12 AM   #8
loukas135
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I did it only once and it's still feeling great. But as MSportX1 said, it is true that the first few yards aren't a blast. The transmission is engaged and start slowly ( but it start !!!! ) and then after a second it goes full throttle.

So, you don't have to do this every time you use the car.

Also, the TBA is "intelligent" and will adapt over time at your driving style. So, if you're always pushing hard when starting, the system will adapt and you'll have to push hard everytime ...

If you change your style, you'll just have to do the reset to start over.
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      03-08-2013, 12:18 PM   #9
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Quote:
Originally Posted by loukas135 View Post
Also, the TBA is "intelligent" and will adapt over time at your driving style. So, if you're always pushing hard when starting, the system will adapt and you'll have to push hard everytime ...
I felt the same thing. It seems that computer can learn your driving style. After TBA reset, if you push gas paddle hard at every stop sign/red light, the throttle response will gradually change.
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      03-08-2013, 02:11 PM   #10
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Quote:
Originally Posted by johanness
Quote:
Originally Posted by Teemo Panda
I read somewhere that this method resets the adaptive drive of the transmission.
No, that is done @ dealership and is a separate thing.
This, in conjunction with the above throttle-body adaptation reset, should get rid of a good portion of lag (and keeping it in DS for good measure).
You could do the adaptive reset yourself also not just the dealer.

I'll find the link of the people that did it on the X5M / X6 forum when I get a windows PC on hand.
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      03-08-2013, 02:36 PM   #11
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Hmmm....think my X5 (listed below) would benefit?



I think I'll try it tomorrow!
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      03-08-2013, 11:48 PM   #12
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Quote:
Originally Posted by johanness View Post
No, that is done @ dealership and is a separate thing.
This, in conjunction with the above throttle-body adaptation reset, should get rid of a good portion of lag (and keeping it in DS for good measure).
http://forums.5series.net/e60-discus...r-shift-40018/
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      03-09-2013, 04:37 PM   #13
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Quote:
Originally Posted by Teemo Panda View Post
Yeah, that procedure has been discussed here many times and it's a THROTTLE BODY ADAPTATION reset.

I'm talking about the TRANSMISSION ADAPTIVES RESET, which can only take place at the dealership. Per work order:
"Reset all adaptation values to erase transmission adaptive values". It will essentially un-learn any sluggish shifting/driving characteristics, thus improving the 'tip-in' issue that much more.

Do both of the above and you're on your way to a more responsive X1. Repeating the throttle body reset every couple of weeks helps too.

Last edited by johanness; 03-09-2013 at 04:44 PM.
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      03-09-2013, 09:28 PM   #14
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Did the reset and the results are very noticeable. Thanks to the op for the tip!

I wonder if this sluggishness off the line isn't the result of some fuel-saving programming to keep the MPGs high...
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      03-09-2013, 10:03 PM   #15
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I also did the TBA reset, just as outlined. Heard the "mechanical sound" and everything. Went for a drive and found it had no effect whatsoever.
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      03-10-2013, 01:37 AM   #16
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Ditto. No change at all.
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      03-10-2013, 02:54 AM   #17
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Quote:
Originally Posted by Transfer View Post
Ditto. No change at all.
Are you having a problem? Everyone doesn't need to reset, only if you are experiencing delay.
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      03-10-2013, 11:46 PM   #18
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Quote:
Originally Posted by nospam View Post
Are you having a problem? Everyone doesn't need to reset, only if you are experiencing delay.
Yes. But maybe it isn't the same problem, who knows? During normal stop and go driving I don't really have a problem. But, if I want to make a quick start and really put my foot into it, there is a noticeable, very annoying delay. My test is that from a stop, I stab the throttle to the floor and immediately let it up. When I do this, I get no response at all. No revving, no movement. The car just starts to idle away from the stop as the pedal returns to 0%. I'm beginning to think there is nothing that can be done, except possibly, installing a tune.
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      03-11-2013, 12:34 PM   #19
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Quote:
Originally Posted by MSportX1 View Post
Some people said that the TBA reset needs redo every a few weeks. But, I just did once a month ago. It still drives ok. At a stop sign or red light, if I press the gas paddle, I can feel the transmission immediately engaged. But frankly speaking, for the first 5-10 yard my car (X1 XDrive28i) performs just like an average car and does not feel fast enough. But, after 10 yard, it become a different car and can beat most of cars.
thanks for the response. Kinda sucks, the start makes a big difference especially at a red light.
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      03-11-2013, 02:42 PM   #20
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My wife did this procedure and I felt basically no difference. I think it's pretty much a matter of people getting used to the lag. It's been said by car journalists, that you could only do a car review within the first 2 weeks of having the car. After the first 2 weeks, you will have gotten used to the car, and everything will become 'normal' to you.
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      03-11-2013, 02:48 PM   #21
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Quote:
Originally Posted by Spinynorman View Post
Yes. But maybe it isn't the same problem, who knows? During normal stop and go driving I don't really have a problem. But, if I want to make a quick start and really put my foot into it, there is a noticeable, very annoying delay. My test is that from a stop, I stab the throttle to the floor and immediately let it up. When I do this, I get no response at all. No revving, no movement. The car just starts to idle away from the stop as the pedal returns to 0%. I'm beginning to think there is nothing that can be done, except possibly, installing a tune.
I'm not sure a tune will help this. Have you demonstrated this for your dealer service center? I would definitely work to get them to address this as I have never experienced this, before or after installing BMS tune.
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      03-11-2013, 03:12 PM   #22
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I did it a couple days ago, and have noticed an improved response in my throttle. Of course, I drive like a granny in the winter (gotta protect my baby!)...
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