You Tube

 

Take a video of a full wide open throttle pull from a standstill and another one of you punching the throttle wide open at 40 mph.

 

I'm going to take them.

do you have any idea what it can be?

 

Ive been having this issue as well. It has gotten better somewhat but ive replaced so much. Injectors, fuel pump housing, fuel pump, alternator. Ive heard that it may be my acc. Pedal but i thought it to be too weird to replace it. Log wise i am leaning out. I installed a fuel pressure gauge to see that it does go down WOT. Lethal numbers for my fuel pressure. You can hear the fuel cut same as in the video.

Let me know if you have fixed this issue.
my voltage to fuel pump under load is fine. No leaks at dampener. My tuner said he ls never seen anything like it .

 

How low does it hit at max rpm?

 

My car just started doing the exact same thing! Have you had any luck narrowing down the issue?