09-05-2017, 01:45 PM | #1 |
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Too slow when I start to go. Anything help?
Hi all! I've got a 2014 X1 xDrive35i with the M Sport package that we purchased about 6 months ago, and we're mostly liking the car. But what's annoying us to no end (my wife and I both drive it, depending on who's hauling the kids somewhere), is the lag when starting from a standstill in normal drive mode. To avoid a far too long pause between throttle pedal engagement and the car actually moving forward, I need to mash the throttle and launch the car too aggressively for normal driving. A Dinan tune improved this slightly, but only slightly. Would a transmission software flash help address this? Or is it just the nature of the beast? Am I expecting too much after decades of driving only manuals?
From 5 mph on, it's a joy, but that 0-5 mph is driving me nuts. With all wheel drive and gobs of power at low rpm, you'd think it would be crazy-quick off the line, but our old 2003 Mini Cooper S with a huge power deficit and fwd, makes the X1 look like a grandma trying to get out of a lazy boy if you launch it with anything less than lead footed aggression. There has to be a way to get a response time that's somewhere in between a drag racing launch and 80's dial up internet. But after months of trying different amounts of pedal modulation, or trying to get used to the lag, neither my wife or I have managed any success. When the shifter is in sport/manual, it is better starting off, and feels like the torque converter locks up much quicker, and there's less of the annoying lag, but the shift points in sport aren't always appropriate for casual driving around town. Is there a transmission flash that helps remove the huge lag from a stop in normal drive mode, while maintaining the more conservative shift points, and also allowing for higher rev and faster shifts in sport with rev matched downshifts? Alpina, xHP, other, or none of the above? Any other ideas? God, I miss my e46 330i! Thanks for your help, Michael |
09-05-2017, 02:19 PM | #2 |
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Its an absolute fucking joke that the Ultimate driving machine has this inherent MASSIVE throttle lag to save 1% on gas.
Infuriates me. |
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09-05-2017, 03:54 PM | #3 | |
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XHP may lock the torque converter up sooner but IMO D mode isn't quite as nice. I also feel that your symptom would be better resolved with MHD.
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09-05-2017, 05:54 PM | #4 |
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Try this, I do it fairly often to reduce my frustration.
http://e84.xbimmers.com/forums/showthread.php?t=812743&highlight=Throttle |
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09-05-2017, 08:07 PM | #5 | |
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It's not perfect, but it's dramatically improved. To everyone else who commented or offered suggestions, thank you as well. I still might try a transmission flash, and would love feedback from anyone whose had one installed, but I no longer feel desperate to get something done. |
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09-05-2017, 08:13 PM | #6 | |
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09-05-2017, 08:16 PM | #7 | |
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09-05-2017, 08:18 PM | #8 |
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09-06-2017, 01:33 PM | #9 |
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My BMW dealer re-flashed my X1's transmission ECU when I complained about shift lag. They say the file was corrupted. Done under warranty. It is after all our family hauler. We don't drive the car too hard, but once in a while I'd give it the good 'ol Italian Tune-up.
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09-06-2017, 07:23 PM | #10 |
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These will blow your mind at removing built in throttle lag. See Link.
https://bimmian.com/Accessories-for-...ttle-Remapper/ |
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09-07-2017, 01:19 PM | #11 |
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At this point I would go MHD once warranty is over or just leave it alone. $320 for the product listed above doesn't make much sense.
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09-07-2017, 02:33 PM | #12 |
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@OP
The transmission in your car has electronic control module that has the ability to adapt to your driving style. In your case two people drive the car and I doubt both have the same exact driving style. So the transmission is adapting to the less aggressive one. When you did the transmission adaptations reset procedure the module became "virginized" and will learn from that point. To me in that mode the car is way too "jerky" and I perform that only as part of transmission fluid change. Also those adaptations are not used in sport mode. |
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09-14-2017, 01:08 AM | #13 |
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I wonder if the OP is experiencing slow throttle response from the car adapting to low speed city driving and turbo lag. If you get a JB4, the newest firmware allows you to make the pedal input more sensitive and you can adjust the default wastegate position to allow the turbo to spool quicker. My X1 seems to be able to get off from a deadstop without discernible delays.
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09-14-2017, 08:29 AM | #14 |
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Maybe that's why I don't notice any lag. I use manual mode almost all the time with the Alpina flash and have never noticed any lag.
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09-15-2017, 02:21 PM | #15 |
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The only "lag" I feel is when I am almost stopped or I stop for a split second and then hit the gas. It feels like a clutch slipping in the transfer case or torque converter slow to lock up.
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09-19-2017, 01:53 PM | #16 | |
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My wife actually complains about it when she has to drive it, saying its scary driving my car due to the power on the pedal compared to her CX9.
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alpina b3, throttle lag, transmission flash, xhp flashtool |
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