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      04-20-2014, 07:15 PM   #1
halfmoonclip
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Hesitation off idle...

I know this has been visited before, and I tried one of the solutions offered here to no good purpose. Frankly, I've learned to compensate by moving the throttle a little extra.
My wife was driving the X1 today, and I had to listen to several choruses of 'my Audi doesn't do that', and, truly, her A4 does not.
Are there any fresh ideas on how to eliminate that 'lag' off idle with the 28i? It does seem to be something in the electronics, because putting it in 'S' seems to greatly decrease the problem.
Suggestions welcome,
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      04-20-2014, 07:26 PM   #2
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Reset your throttle, buy a tune. Those are really your only options.
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      04-21-2014, 09:16 AM   #3
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Disable engine start/stop function, put the car in D/S, and don't forget to disable Stability control by pressing the button once. Leave traction control on is fine(traction control is turned off by press and hold the same button for about 10 sec). If you read the owner's manual it mentioned this setting gives you the best forward motion. I surprised a stick shift 135i at the red light with this setting with my 28i...of course my left foot was on the brake, and my gas was already lightly pressed lol.
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      04-21-2014, 10:11 AM   #4
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Disable Neutral Idle Control?
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      04-22-2014, 01:36 PM   #5
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Quote:
Originally Posted by Kennyboy View Post
Disable engine start/stop function, put the car in D/S, and don't forget to disable Stability control by pressing the button once. Leave traction control on is fine(traction control is turned off by press and hold the same button for about 10 sec). If you read the owner's manual it mentioned this setting gives you the best forward motion. I surprised a stick shift 135i at the red light with this setting with my 28i...of course my left foot was on the brake, and my gas was already lightly pressed lol.
Ken, if you could be a little more specific with some of the directions, I'll give it (another) try.
Thnx,
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      04-22-2014, 04:02 PM   #6
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Actually Kenny is wrong. Traction control is turned off by pressing the button. Stability control and TCS is turned off by pressing and holding (about 4 seconds). Start/stop can be switched off by pressing it's button, however, most 2013 and newer models have it off as the factory setting and pressing the button will activate the ASS. Even in sport mode, there is still too much hesitation from the throttle position system. BMW really needs to remap the N20/8spd combo for better take off. I don't need to launch like a top fueler, but the amount these cars hesitates makes for some really scary passing attempts, or merges into traffic.
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      04-22-2014, 08:26 PM   #7
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I've not noticed a problem, but I drive almost exclusively in SD. Absolutely non-existent in manual mode.

FYI ... it is much more noticeable in my wife's 2009 Mini Cooper S. From what I can tell, the X1 is much improved.

FYI ... the Mini moves out pretty well if you push a bit harder on the gas.
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      04-22-2014, 09:08 PM   #8
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Can't say I'm unhappy with the acceleration under most circumstances; I'll pull it down into 'S' for an aggressive merge or a pass on a two lane, but hate to run it routinely in 'S' just in traffic.
For the most part, I've learned to compensate with a little more 'foot', but it does bug my wife when she drives...
And for the honor of BMW, I'd like to keep her quiet about her Audi....
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      05-13-2014, 12:09 AM   #9
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1# problem in my book. Wish they would remap.
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      05-13-2014, 10:14 AM   #10
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Quote:
Originally Posted by popopine View Post
1# problem in my book. Wish they would remap.
I've expressed the exact same opinion many times over. But nothing will be done as long as BMW continues to insist the throttle behaves as intended. If the intention was to smooth take-offs as some have argued, well I contend it does just the opposite. If that intention was to boost fuel economy, it simply wasn't worth it. After all, isn't that what the ECO PRO mode is for? It's pretty sad when Volvo does something as basic as throttle response tuning infinitely better than BMW.
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      05-14-2014, 09:47 PM   #11
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Quote:
Originally Posted by HotRodW View Post
. But nothing will be done as long as BMW continues to insist the throttle behaves as intended. If the intention was to smooth take-offs as some have argued, well I contend it does just the opposite. If that intention was to boost fuel economy, it simply wasn't worth it.
Amen and amen.
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      05-16-2014, 10:57 PM   #12
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As I said before, I don't notice the problem in SD. I tried in D, but really didn't notice it either.

A theory ... the E39 M5 was noted for throttle response problems (mostly too sensitive). When I first got mine (many years ago), I was fairly ginger on the throttle and was not happy because of the too sensitive throttle. Later, I became less sensitive by running the revs highesr and the car became much more responsive. A lot of the issue could be the OBD adjusting to driving styles ... just a thought.

FYI ... did I mention that I have not experienced this problem on the X1. And ... I'm getting 25 MPG in town using SD exclusively.
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      05-17-2014, 09:19 PM   #13
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I'm lucky to do 21 mpg in town in 'D', tho' we're hillier here.
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      08-18-2014, 03:04 PM   #14
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Bump up. Has anyone who truly has this issue found a solution? It seems some vehicles have the throttle delay and some don't.
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      08-18-2014, 08:28 PM   #15
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Every X1 28i I have driven has this issue. Using DS or M kind of cures the problem, but there is still lag between when you push the pedal to when the engine computer finally decides to do something about it.

The only fix would be going into the computer and make it respond faster that way. Not sure if that's entirely possible though.

I'm beginning to think the problem relates to the ASS, to eliminate too much throttle when the engine is just getting back to run mode after the brake is released. That's just a theory though.

Once I get my JB4 installed, I'll let you know if the throttle delay still exists and if any improvement has been made.
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      08-19-2014, 08:02 AM   #16
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Couldn't this just be turbo lag? and its only momentary because the 28i engine's torque comes on so early?

Perhaps it feels like "throttle delay" because the sensation of turbo lag has been mitigated so much?
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      08-19-2014, 11:34 AM   #17
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It's not turbo lag. As others have stated, it only happens off idle from a stop or near stop. Once the car is in motion and you press the accelerator, the car begins to move almost instantaneously.
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      08-19-2014, 01:11 PM   #18
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I also notice the same kind of lag. I sometime wonder if 8sp r too much for the ecu to handle. LOL. Is there any transmission remap for the 8sp?
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      08-19-2014, 02:50 PM   #19
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It does the exact thing with the 6-speed/3.0 combo. My number 1 gripe, just beating out the erractic "comfort access" system.
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      08-19-2014, 07:07 PM   #20
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It's not turbo lag when you can literally tap dance on the throttle with zero revving occurring. It does nothing for about 1.5 seconds after throttle inputs (when starting from a stop) so you can floor it, let go, floor it again, repeat etc and the car won't move and revs won't rise. It's pretty nuts. FYI, we have ASS defaulted to off and it is never turned on.
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      08-19-2014, 07:24 PM   #21
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Quote:
Originally Posted by Transfer View Post
It's not turbo lag when you can literally tap dance on the throttle with zero revving occurring. It does nothing for about 1.5 seconds after throttle inputs (when starting from a stop) so you can floor it, let go, floor it again, repeat etc and the car won't move and revs won't rise. It's pretty nuts. FYI, we have ASS defaulted to off and it is never turned on.
On mine, it feels like a physical lack of response when pressing the pedal, for about the first 1/2". If I quickly press down the pedal, there's a resistance point, that if I can hold it steady, the next movement will be more direct. Time isn't a factor, for me. Too damn complicated, for just wanting to drive smoothly.
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      08-19-2014, 07:26 PM   #22
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Same here, ASS is off, no eco pro and in M1 from a full stop I get nothing for about 1-2 seconds. I drove an M235i and it didn't do the same. Also, the shifts were much firmer and crisp when using the handle (not paddles). I'm thinking it may be a ZF computer issue. I'm going to see if the M235i 8speed trans software will work with the X1's 8speed. Maybe that will help/cure?

This is the one and only massive gripe I have with this car. It's down right scary when you need to pull into traffic and don't have any throttle response off idle.
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