10-27-2012, 03:33 AM | #1 |
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X1 Owners Do You Notice Throttle Lag?
I recall the 2 test drives with the X1 when accelerating from dead stop, I gently depressed the throttle for an inch and nothing happened. Can any X1 owner confirm this? The model I drove was s28i.
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10-27-2012, 08:38 AM | #3 |
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I think it may depend on if it's the 28 or 35. For me, I thought the 28 had more of a noticeable lag before the RPM changed but the two engines are basically the same (n20 is a n55 with 2 cylinders removed) so I'm wanting to lean towards the ZF 8HP transmission (which is also just a modified ZF 6HP with support for auto start/stop and 2 more gears) being the reason there is more of a pause on the 28 but I have no real data to back that up.
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10-27-2012, 11:54 AM | #5 |
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I am not referring to the turbo lag or transmission here, but the digital throttle lag. My question: is there a
(a) freeplay in the beginning travel of the throttle pedal, or (b) a delay in the throttle esponse, or (c) none Help me do this test: put the gear in P and (a) slowly depress on the throttle pedal, and (b) quick jab on the throttle pedal, and see the different responses in the tachometer. |
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10-27-2012, 04:15 PM | #7 |
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Yes, this is the "electronic accelerator". No wire here. I also was a little bit concerned about it when I got my first roadtest. After a year, it is not bothering me at all. I think I kind of found a way to apply just the good amount of pressure to make the car going forward ... This is really a "no wire" particularity. No turbo lag at all here. But you definitly got a point here. There is some kind of a "dead zone" but this is due to the electronic and not the turbo.
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10-27-2012, 06:43 PM | #9 |
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Unfortunately it's likely the drive by wire, every BMW I've had/driven since my 2000 328ci ( which was prior to DBW) has suffered from varying amounts of lag due to it. Aftermarket software like Dinan can improve it but otherwise I've just relied on driving in sport modes with SMG, DSG or autos, and with a manual it just was a drag and had me looking at software upgrades. I really don't know why BMW is not improving the throttle responsiveness if they want to support the notion these are drivers cars
So it's worse on the 8 speed vs the 6 speed for sure? |
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10-28-2012, 01:09 AM | #10 |
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I experimented with this tonight. In park, it's responsive and rev happy. In D or N, if you tap the throttle for about 1-2cm, you can do it in a way that it doesn't do anything at all. There is definitely a gap in throttle for the first 5-10% of the pedal that is not present while in park. WTF?
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03-05-2013, 08:21 PM | #11 |
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i test drove the 28i and noticed at least .5 sec of throttle lag... thats why i ended up getting the 35i. it would drive me nuts in everyday driving. the throttle lag existed regardless of whether you eased into the throttle or floored it immediately. its very common for 4-turbos but here its worse than i've seen in audi and vw 2.0Ts
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03-05-2013, 08:30 PM | #12 |
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If you want the real performance on an X1, make sure you have DS mode on and not Eco mode.
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2013 BMW X1 35i "M"....ordered on Jan 13 2013 / received on Feb 19 2013
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03-05-2013, 10:32 PM | #13 | |
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After doing some research, I decided to try the PedalBox. I just got around to installing it this past weekend. Unfortunately, the results were disappointing. It had no effect at all when doing the 'stab test' on any of the PedalBox settings. However, I did find a setting that I found a little more responsive and enjoyable in stop and go driving, so I think I'll keep it. But for most people I don't think it's worth the money. |
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03-05-2013, 11:22 PM | #14 |
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I've noticed this as well and have adapted by basically stepping hard on the gas (from a stop). I can't help but wonder if this isn't in some way connected to the the whole Automatic Start/Stop programming.
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03-06-2013, 08:50 AM | #16 | |
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My other car is an S2000 so I should be even more sensitive to lag. In ECO PRO I have significant lag even in P or N. |
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03-06-2013, 12:01 PM | #17 |
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Exactly. The throttle response is very good in DS mode. Also a lot of people are not familiar with turbo cars, and cars with modern auto transmissions which keep the revs very low. When you step on the gas, the transmission actually has to downshift several gears before you can accelerate out of the hole. Add to that the turbo lag. This is a fairly heavy car. When the turbo is not spooled, you can imagine this car being no different than a big heavy car with a 2.0 engine. In other words slow. It takes half a second for the turbo to spool. That could feel like an eternity for people not used to it.
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03-06-2013, 12:08 PM | #18 |
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Solution is to reset the TBA ( Throttle body adaptation ) and here is how:
- 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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03-06-2013, 02:35 PM | #19 | |
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Let me add that DS mode shifts lightning quick while D asks "are you sure" at times before downshifting. |
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03-06-2013, 10:10 PM | #20 | |
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03-07-2013, 08:27 AM | #21 | |
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1995 325i, 1996 328ci, 1997 528i, 1997 Z3 2.8, 2000 528i, 2001 X5 3.0, 2001 330i Convertible, 2002 M3 Convertible, 2003 M3 Coupe, 2004 M3 Coupe, 2004 Z4 3.0, 2004 X3 3.0, 2007 X3 3.0, 2007 335i Convertible, 2013 X1 28 sdrive, 2014 M235 manual, 2020 X3 30i Xdrive
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03-07-2013, 11:19 AM | #22 |
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I associate this lag with any automatic. And BMW is shorter than most. There are days when driving my manual TDI is more fun.
The lag gets ridiculous if you turn on eco-mode. I have to push the accelerator half way to the floor before I get any acceleration in the slightest (ie, before the car actually responds and moves). |
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