Stuttering

[Marcusbimmer]

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?

[Obs-Com]

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.

[ori]

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.

[ori]

Did you get to the bottom of this?

[Marcusbimmer]

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.

[ori]

Sounds like it was the fuel.

Only fill it with the good stuff!