05-20-2017, 07:47 PM | #1 |
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Throttle lag
Hiya All,
I have an automatic M240i and am generally happy with it but have noticed resently that from a stop position there is a slight delay when pressing the accelerator and moving off. I find that it's more noticeable driving in eco and normal mode. In sport or sport + it isn't as bad but it's still there. Also when driving and at constant speed and I need to step down on accelerating the delay is there. I googled this and on bimmerfest there are posts about "tip-in" back in 2011 about 5 series owner experiencing the same thing. -Has anyone else with a 2 series experienced this? -Is this a "characteristic" of the brand? -if this is an issue, has anyone in the U.K. been successful in getting this rectified? Thanks |
05-20-2017, 09:08 PM | #2 | |
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05-21-2017, 06:27 AM | #3 | |
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05-21-2017, 01:58 PM | #4 |
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It's been an issue in both N55 auto xdrives I've had; X3 and current M235i. Didn't have this issue with the N54 135i which was also auto but RWD. It's annoying and for me most noticeable coming to a rolling stop and then taking off or when cruising around 35 and changing lanes and trying to quickly accelerate there is a noticeable pause which is almost dangerous. I always drive in sport throttle setting. Hate that it's still an issue with the M240. Also appears to be same issues with S3 and MB GLA45, so not sure what's going on.
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05-21-2017, 02:09 PM | #5 | |
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Previous Cars: 2008' 135i, 2010' 328i, 2013' 328i, 2016' M235i, 2017' X1, 2019' M240i, 2019' X3, 2021' M3 Comp, 23' Camaro SS 1LE, 24' Lexus IS500 Current Cars: 23' Tesla Model Y Performance, 11' BMW 335I. Coming Soon: 25' BMW M2 Manual |
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05-21-2017, 03:47 PM | #6 |
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Thanks for your replies. I'm glad to hear it's not just my 2 series then. I can probably live with it and I mostly mix my drive settings anyway but this would Definately put me off getting another BMW. Does the M2 have this issue too I wonder.
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05-22-2017, 06:27 AM | #10 | |
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Thinking it's the electronic throttle (drive by wire) on the car that account for the slight hesitation we feel. 2015 Mini Cooper (BMW lite) displays the same behavior. I asked a similar question on that forum initially too. I traded in a Hyundai Santa Fe for the Mini and didn't seem to have that hesitation. Was told that it's just the way it is. I'm accustom to it so I don't pay much attention anymore. Perhaps it's just the way BMW's are engineered. Have not spent time in other German car to see if they display the same behavior. Since having the Stage 1 installed, I have noticed a marked improvement. Likely because Dinan tune changed the throttle mapping. There are plenty of articles talking about electronic throttles vs. cabled. http://www.city-data.com/forum/autom...-throttle.html https://www.carid.com/articles/why-s...ontroller.html |
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05-22-2017, 03:54 PM | #11 | |
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05-22-2017, 04:06 PM | #12 | |
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05-23-2017, 11:16 AM | #13 | |
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I do believe the Dinan Elite does more than just "up the boost", or at least that's what they advertise the Elite doing over the Dinan Sport or other sub $500 piggybacks. http://www.2addicts.com/forums/showthread.php?t=1357282 If I had to evaluate the difference I have personally noticed in my car...the amount of lag I experienced when in sport (pre-tune) is now what I notice in Comfort w/ the Dinan Elite tune (just a very slight hesitation), but nothing like it was prior to the Elite install. I was pleasantly surprised to see this improvement since I normally drive the car in Comfort anyway around town. When I now put the car into Sport the lag is virtually gone...or at least I don't notice it. I have not tried any other tunes on this car, just the $1399 Dinan Elite which my BMW dealer installed. I have seen improvement in my car as far as overall performance (extremely fast) and as stated above, normal operation has improved also. |
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05-23-2017, 06:14 PM | #14 |
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Coming back to amend the above post. Spent the day in the M240i and did lots of start and stop in "comfort" driving. I can report that I have zero lag at all in Comfort.
I was conceding that there might be some, but after refreshing my memory w/ that very thought in mind today, I can say the Dinan Stage 1 eliminates the lag that I had noticed prior to the install From a dead stop, applying pressure to the gas pedal results as smooth a take off as any car I have ever owned. No hesitation, lag, stumble, zero, zilch, nada. That being said, if I do the "California pause" Not coming to a complete stop and the accelerating, I do notice some hesitation. But from a dead stop. no hesitation at all. Last edited by USA-RET; 06-12-2017 at 09:35 AM.. |
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06-30-2017, 02:21 PM | #17 |
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I've test driven the M235i and M240i, there is a little bit of lag but I was impressed that it wasn't worse. It's about the best throttle response I've experienced from a Turbo. I'd guess the 4 banger turbo is horrible, the X1 has some serious lag, very unsatisfying. VW and Audi 4 turbos, disappointing.
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06-30-2017, 03:43 PM | #18 |
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Not exactly apples to apples, but I've driven a M235i with the ZF8 and my own M240i with the 6-speed manual, and the lag felt more pronounced with the auto box. Or maybe the B58 is just that much better at reducing lag.
It's really next to nothing. If you want to experience real old-school lag, drive a Porsche 944 Turbo for a bit!! |
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06-30-2017, 04:15 PM | #19 |
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Had it happen again this week. Stopped at a red light, slight decline, light turned green, applied moderate peddle pressure, car moved a couple inches, pause, and then off like normal. I'd call my issue throttle pause, and it happens every now and again from a dead stop, a rolling stop and go, and then switching lanes and trying to accelerate simultaneously. I don't think it has anything to do with turbo spooling, or the throttle at all, i believe it's traction/stability system or something. Yet, I've turned all that crap off and it still persists. It could be something to do with AWD vs RWD too. Same exact issues with AWD N55 X3 prior. Annoying.
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06-30-2017, 07:04 PM | #20 | |
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06-30-2017, 08:01 PM | #21 | |
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07-01-2017, 09:23 AM | #22 |
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It's also partly the transmission adaptation. If you drive it more aggressively, you'll notice less lag in the coming days. If you go on a lot of gentle highway drives, it will start to be a little more conservative in the power output.
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