2015 335 high rpm hesitation

[F30jooel]

Hoping someone could help me identify an issue I am having.

Car is a 2015 N55 with VRSF intercooler, charge pipe, and catless downpipe. Tuned on MHD stage 2+ on 91 octane. Car has been running perfectly fine until the other day. All of a sudden while at WOT from about 5200rpm-5800rpm the car hesitates like loss of some power then back to normal . Before and after that rpm it’s fine. I have brand new spark plugs and coil packs. Not even a 1000 miles on them. Also, my fuel rail pressure in that rpm range dips extremely low. Normally it’s around 2400-2800 in that rpm range. Today it’s from 1800 to as low at 1200 in that rpm range.

From the research I’ve done it could be anything from a bad HPFP or LPFP or bad injectors or a clogged fuel filter but I haven’t seen anything concrete.

I woud rather not have to throw money in different parts. Can anyone guide me to what they believe the issue could be?

[MarcoZandrini]

How many miles on the car? What’s the maintenance history of the fuel system?

[F30jooel]

How many miles on the car? What’s the maintenance history of the fuel system?

39k miles and I haven’t done any fuel maintenance

[MauiM3Mania]

The discussion has been shuffled over to the model specific sub-forum.