Stumble at 1500rpm

kieefer

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First Name
keith
Joined
Dec 26, 2017
Threads
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Location
Tennessee
Vehicle(s)
2019 2WD SuperCab - 97 BMW M3
Occupation
Retired
I’ve noticed this since new and wrote it off as bad gas. It does seem to run better on premium fuel but I can still notice it at times.
Around 1500rpm it feels like it starving for fuel, kinda hunting for the right mixture.
Most noticeable by easing on the throttle slowly speeding up. If I step on it and speed up fast it’s not as noticeable.

I’ve stopped at the dealer and they won’t do anything without a CEL.

I purchased the GFB+DV and that seemed to help but it may be more in my foot because fuel mileage dropped a bit, I’m accelerating faster past the stumble point. (Yeah I know, that’s the fix).

I’m going to attempt another dealer visit but I’m also looking at a local speed shop that might can look at the fuel mapping.

Any suggestions, similar experience or thoughts?
5k miles, build date is 3/19 2wd SCab
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