Stuttering

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Marcusbimmer
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Stuttering

Post by Marcusbimmer » Tue Jun 01, 2021 3:53 am

Help! Brand new Z4 M40i; had the dealer install LED door lights this weekend. Seemed to be fine after that. The next day (likely coincidence), during initial drive-away, there is a stuttering in the acceleration. Once I tapped the gas and it didn’t want to got then I did it again and it paused then went. Happened to my spouse today again. Scared her. It’s like a delay in gas pedal to acceleration. Anyone have any insight on this? Can the dealer remotely interrogate the ECU or do I have to drive 1.5 hours for this?
X6 M50i
Z4 M40i

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Obs-Com
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Stuttering

Post by Obs-Com » Tue Jun 01, 2021 8:38 am

Get to the dealership for diagnostic check as needs to be plugged in. Don’t think this can be done remotely. Not aware of any similar issues with the M40i. Hope it gets sorted and be helpful to give an update once you know.
2011-14: E89 2.3sDrive
2014-16: E89 35is - Valencia Orange X2 (gone but not forgotten)
2016-17: F33 440i
2017-17: E85 2.5si
2017-19: F87 M2 - Long Beach Blue DCT (Stunning)
2019-??: G29 M40i First Edition (more stunning than the M2)

ori
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Stuttering

Post by ori » Thu Jun 03, 2021 3:09 pm

Call BMW assist from within the car. It’s unsafe to drive like that. They will send a guy over and he can plug it in and find fault. Your car will be repaired quicker that way too.

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Stuttering

Post by ori » Sun Jun 06, 2021 7:22 am

Did you get to the bottom of this?

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Marcusbimmer
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Post by Marcusbimmer » Fri Jun 11, 2021 1:36 pm

So interesting.... Doesn't happen anymore. The ONLY thing that came to mind is that I filled the tank with PetroCan 94 gas at a station which normally probably doesn't sell a lot of 94 grade. That's the ONLY thing I can think of that was different. BUT, it didn't start until abou halfway into the tank so that doesn't make obvious sense either.
X6 M50i
Z4 M40i

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Stuttering

Post by ori » Mon Jun 14, 2021 12:05 am

Sounds like it was the fuel.

Only fill it with the good stuff!

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