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      08-19-2017, 01:06 PM   #1
anon1000
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Throttle response - how to fix?

Hello,

So, last night nearly got hit by an 18 wheeler when my X5 F15 50i decided not to move when I hit the throttle. Seems like a lot of BMWs are suffering from initial throttle response issues.

So, how do you fix this? It was too close to comfort and the dead spot was too long, especially when after that you factor in the turbos needing to spool and the slushbox. It seems it is way worse when the engine is cold - I drive it in Sport mode always, comfort mode it feels I am getting a quad workout for pushing the throttle to the engine bay for it to move.

Is there a way to reset the throttle response without visiting the dealer? Could not find a process that works.

Will tunes address this issue, I am thinking about Burgertune. Any other choices to address this?
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      08-19-2017, 01:06 PM   #2
anon1000
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And also, if you don't see me posting more, please go sue BMW for this issue.
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      08-19-2017, 04:24 PM   #3
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I may opinion throttle response (hesitation) has been an issue since auto manufactures went to DBW (drive by wire) in 2000/2001.
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      08-19-2017, 05:36 PM   #4
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I've had both the 35i and now 50i. I don't think it's as much of a throttle commanded issue, as it is a turbo spool issue. Seems like the 50i takes just a second longer to spool the turbos and it's likely in a lower gear when caught off guard compared to 35i since it has so much more torque. Once the turbos spool though... it scoots. I feel your pain though. Just today I pulled out in traffic and gave it a healthy dose of throttle and it was a 1,2,3 count, then blastoff. Are you flooring it all the way when this happens? If you don't apply full throttle it may hesitate to downshift on top of the turbo lag.
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      08-19-2017, 05:44 PM   #5
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This is not turbo lag issue or downshifting issue, this happens when taking off from standstill. Once the throttle wakes up, then you need to wait for spool.

And it is not consistently bad, seems like when it is fully warm it reacts better. Similarly it bogs when you lift your foot off the throttle and go back on, 1 missisisspii 2 mississippi
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      08-19-2017, 09:54 PM   #6
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Quote:
Originally Posted by anon1000 View Post
This is not turbo lag issue or downshifting issue, this happens when taking off from standstill. Once the throttle wakes up, then you need to wait for spool.

And it is not consistently bad, seems like when it is fully warm it reacts better. Similarly it bogs when you lift your foot off the throttle and go back on, 1 missisisspii 2 mississippi
I usually take it from Sport mode to Comfort to bog down fast response when I'm city driving. In Sport it's very responsive - more than my previous e90 328i

Something is not right here
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      08-19-2017, 10:20 PM   #7
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Nevermind, just re-read OP that always driving on the sport mode.
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      08-20-2017, 07:48 AM   #8
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I installed a Sprint Booster at the pedal. Has several settings to increase throttle opening speed up to 60%. Very happy with it, 5 minutes to install. I only have it set at the halfway point and never any delay. Turned up all the way and it is very sensitive.
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      08-20-2017, 10:32 AM   #9
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I had an issue that was similar but the cure was obvious. When in part throttle the car would shudder quit a bit. This went on for over a few years until I got a call from my dealer and said that there is a fix for this. It was a reprogramming of the ECU. Bottom line is that no longer do I have the shudder but my response to throttle has been changed dramatically. This is not a placebo effect or anything like that, it was changed. Don't know if you vehicle has this shudder or not mine was a 2014 50i so maybe later ones did not have the issues that I did.
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      08-20-2017, 11:10 AM   #10
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I agree, OP. Same thing in my 50i. Very annoying (and potentially dangerous) waiting for the message to get to the engine.
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      08-20-2017, 11:58 AM   #11
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in addition to sport mode, kick the shifter over to the left to put it in sport auto transmission mode. will keep your engine at higher revs. the torque curve on the 50i doesn't wake up until 2000 rpm. stay above that if you want faster throttle response.

another option may be a RaceChip or similar. I don't have one on my 50i, but reading on the forums it is purported to help.

And I agree, it is annoying for a high performance vehicle. They need to have a "soccer mobile off" setting.
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      08-20-2017, 09:03 PM   #12
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Quote:
Originally Posted by Jason73 View Post
I installed a Sprint Booster at the pedal. Has several settings to increase throttle opening speed up to 60%. Very happy with it, 5 minutes to install. I only have it set at the halfway point and never any delay. Turned up all the way and it is very sensitive.
Where did you get yours? So, it remaps throttle? I am wondering if burgertuning stage1 will do the trick, faster response and a bit more breathing and mid range torque.
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      08-20-2017, 10:39 PM   #13
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Quote:
Originally Posted by anon1000 View Post
Quote:
Originally Posted by Jason73 View Post
I installed a Sprint Booster at the pedal. Has several settings to increase throttle opening speed up to 60%. Very happy with it, 5 minutes to install. I only have it set at the halfway point and never any delay. Turned up all the way and it is very sensitive.
Where did you get yours? So, it remaps throttle? I am wondering if burgertuning stage1 will do the trick, faster response and a bit more breathing and mid range torque.
A tune will not fix it.
A sprint booster may, a few different companies make them.
RaceChip also have it.
But, I personally don't like it. What it does is changing the input signal of your throttle position.
So, instead of fully open or unpressed pedal, the module will tell the ECU they the pedal is at 5% or 10% pressed or closed circuit.

There is another way to reset the pedal response.
I have tried this and somewhat work. I found this by using the best tool in the world, "Google".

1. Never touch the break pedal & key remains inserted the entire time
2. Insert key and push START Button
3. Press and HOLD accelerator pedal for 30 seconds (some say 5, some say 25 seconds - I did 30 to be sure).
4. WITHOUT RELEASING THE ACCELERATOR PEDAL, push the START Button
5. Release accelerator pedal
6. Wait full 2 minutes
7. Start car normally
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      08-21-2017, 05:53 AM   #14
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Ordered mine through Auto Anything. They usually give a discount if you ask for it and ships for free.
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      08-21-2017, 02:02 PM   #15
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Quote:
Originally Posted by r33_RGSport View Post
A tune will not fix it.
A sprint booster may, a few different companies make them.
RaceChip also have it.
But, I personally don't like it. What it does is changing the input signal of your throttle position.
So, instead of fully open or unpressed pedal, the module will tell the ECU they the pedal is at 5% or 10% pressed or closed circuit.

There is another way to reset the pedal response.
I have tried this and somewhat work. I found this by using the best tool in the world, "Google".

1. Never touch the break pedal & key remains inserted the entire time
2. Insert key and push START Button
3. Press and HOLD accelerator pedal for 30 seconds (some say 5, some say 25 seconds - I did 30 to be sure).
4. WITHOUT RELEASING THE ACCELERATOR PEDAL, push the START Button
5. Release accelerator pedal
6. Wait full 2 minutes
7. Start car normally
I did this Google thing, but the butt in the seat thing said no difference I think it is for older models only.
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      11-23-2019, 07:38 AM   #16
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Quote:
Originally Posted by Jason73 View Post
Ordered mine through Auto Anything. They usually give a discount if you ask for it and ships for free.
Bump. Did it improve any?

Also I have a Dinan on my '17 F15 and the throttle response for downshifting is still terrible.
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      11-23-2019, 01:16 PM   #17
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No hesitation at all. Very adjustable to suit how responsive you want it to be. I am happy with improvement to responsiveness.
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      11-23-2019, 06:45 PM   #18
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RaceChip is having $50 off on the XLR until end of November 2019.

FYI, I have to re-visit my comment on RaceChip XLR after had a personal experience on it.

It is actually make driving more fun and automatic down shifting more easier when needed.
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      11-23-2019, 06:53 PM   #19
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I can also vouch for anything Ben sales. I have a Racechip RS paired with my booster. If Ben says the Racechip XLR is good then I would have to agree with that as well.
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      11-23-2019, 08:27 PM   #20
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Quote:
Originally Posted by anon1000 View Post
This is not turbo lag issue or downshifting issue, this happens when taking off from standstill. Once the throttle wakes up, then you need to wait for spool.

And it is not consistently bad, seems like when it is fully warm it reacts better. Similarly it bogs when you lift your foot off the throttle and go back on, 1 missisisspii 2 mississippi
XHP FLASHTOOL stage 3 really does wonders with gear selection/shifting
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      11-24-2019, 08:40 PM   #21
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When was the air filter last replaced? I hate throttle response delay. To help avoid the issue I replace the air filter every year and spark plugs at 30K.
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      11-24-2019, 09:06 PM   #22
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Sprint Booster is the way to go. Bought it here with a GB 2 months ago as I just couldn't take the throttle delay any more. I can not imagine driving the ///M without it now. Liked it so much, had to have it for my '02 E55 ( love driving the car now) and be buying a third one for wife's 530i.

Like Nike ad " Just Do It" ..
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