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  #1  
Old 11-01-2011, 11:02 PM
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Acceleration Delay...help please

We have a 2011 X5 with the gasoline fueled turbo engine. When I step on the accelerator pedal there is a delay (~0.5 seconds) before the power comes on. The SUV has about 7k miles now and the issues seems more noticeable now than when it was new.

I have had other turbo charged cars so think I know what turbo lag is. I don't think it turbo lag. This seems like a communication issue between the pedal and the brain.

I did a search here but did not find the answer. I may have not searced for the correct term.

I'm guessing we are not the only folks experiencing this issue.

Anyone know what's going on?

Thanks for the help.

Bob-
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  #2  
Old 11-02-2011, 02:37 PM
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Lots of looksees...

No opinions?

It's ok to tell me if you think I'm crazy


Bob-
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Old 11-02-2011, 02:46 PM
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You can try this from another thread posted by LemansX5 to reset the throttle response. Might be worth a try?!
---------------------------------------------------------------------------
Originally Posted by LeMansX5 View Post

Reset throttle response:

1) Insert the key & push the start button. (Don't touch the brake pedal & don't remove the key at any time)

2) Press & hold the accelerator down for 10 seconds.

3) Without releasing the accelerator push the start button.

4) Release the accelerator.

5) Wait a full 2 minutes.

6) Start the car normally & drive to see if it's more responsive.
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Old 11-02-2011, 02:52 PM
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You are crazy!

j/k. Figure out if you can drive another X5 35i to compare with yours? Friend? Pretend test drive?
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Old 11-02-2011, 03:30 PM
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Quote:
Originally Posted by 4MoJoe View Post
You can try this from another thread posted by LemansX5 to reset the throttle response. Might be worth a try?!
---------------------------------------------------------------------------
Originally Posted by LeMansX5 View Post

Reset throttle response:

1) Insert the key & push the start button. (Don't touch the brake pedal & don't remove the key at any time)

2) Press & hold the accelerator down for 10 seconds.

3) Without releasing the accelerator push the start button.

4) Release the accelerator.

5) Wait a full 2 minutes.

6) Start the car normally & drive to see if it's more responsive.

Thanks Joe. I'll try the reset tonight.

Bob-
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  #6  
Old 11-02-2011, 03:32 PM
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Quote:
Originally Posted by hk007 View Post
You are crazy!

j/k. Figure out if you can drive another X5 35i to compare with yours? Friend? Pretend test drive?
Good idea 007. This will provide a second data point to compare to.

Thanks,

Bob-
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  #7  
Old 11-02-2011, 09:00 PM
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Have you tried starting in DS mode or shifting to M1? I find starting in 2nd to be sluggish.
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Old 11-06-2011, 12:05 PM
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Did the reset. Some improvement.

Thanks!

Bob-
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Old 11-06-2011, 07:37 PM
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didn't we find in a posted tech document a couple years back that the reset is only for that session since it only learns for that session and it resets whenever the vehicle is shut off? I recall posting the doc.

Anyway, the lag is somewhat normal to BMWs in my opinion.
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Old 11-07-2011, 11:46 AM
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This is a known behavior (as I don't want to use the term "problem"). You have to feather the gas pedal initially and then you press hard, you are good to go.......... but if you press hard to begin with you will experience this "delay". There's a DIY device you can buy for around $200-$300 that eliminates the lag. Sorry I don't remember what its called off hand.

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