RS3 built DAZA engine rev hickups during load

[Temoria]

Hello people.
I have a problem with my Audi rs3 2018 that i cant figgure out..

After I picked up my rebuilt engine from my local shop in April inhave had this wierd rpm hickups when Igoing wot or press the pedal down futher than 50% ”approx”

I can see in the log that the rpm isnt going straight up, its going up and down. Just slitghtly, like 100 rpm or so.
U can see on the dash that the needle does very small jumps/hickups as its climbing to reach my full boost which is at approx 4500 rpm. Then when power hits, u cant feel the hickups no more. It feels like a missfire almost but the log does not show anything more than that the rpm isnt steady.
My tuner dont know what it is eather..

We have tried many different thing to find the issue.

-we removed the propshaft to see if it was the reardiff that was bad. SAME PROB
-we changed the transfercase and oil. SAME PROB
-we tried another tune from another guy for my setup. SAME PROB
-we tried changing from uni s4 to s3 and another tune, even stock tune. SAME PROB
-we removed the gearbox and splitted it to look at bearings and shafts. All good.
- we inspected the clutch and flywheel. All good.

Can anyone please help me find a solution for this, i dont know what to do next..

Build spec:
Daza built block and fullt build and cnc ported head.
Ims850 turbo kit
DCT1200 clutches
Upgraded dual lpfp and fuel lines
5” intake and 4” inlet from iroz
Tuned on DS1 and Unitronic S4/S3 on the TCU.
Full e85 (pump e72…)
Rougly around 850hp on 38psi of boost
Water meth injection
Forge motorsport IC and couplers
VTT engine and dsg catchtanks
Motul 10W60 engine oil

+ alot of extra drivetrain related stuff aswell that is not relevant i guess.

Sorry for long post and hopefully I can find a smart guy or women out here to help me put :)

Take care

/S

[lemonvr6]

Spark plugs?

[R1ce]

Do you have any logs of when that's happening? That's where I'd start and should at least give a better picture of what is actually happening. Also, ss that the range where you are spraying water/meth?

[o1turbo30v]

post in here, hopefully get some more help https://www.audizine.com/forum/forum...-RS-3-Specific

[Temoria]

Thanks for ur reply folks.

Yes I have logs of it. U can see the rpm goes up and down and doesnt pull in a straight line. Ive tried several tcus and ecu maps from different tuners. Still the same. Wmi is sprayed at actual boost targets. Had this problem even before I started using the wmi.
Can anybody help me with looking at a log by any chance? My tuner didnt see anything on logs back in april when I found this out.

Thanks