Hello!

Maybe someone can help me with diagnostics with one car.
It is Audi S6 4.2 340HP.
There is problems with air mass. it drops few times at WOT from 2000-7000rpm.
for example 150g/s then 145g/s, then goes up for some time and then again 180g/s - 177g/s and up.
what could be reason here? I was thinking about ignition problems, but can't find right cylinders in measuring blocks.
looked in original software and there find 2 measuring blocks (15, 16 in VCDS)
first 88 95 93 90
second 89 92 94 91

from funktionsrahmen file I get

88 dwkrz_0 zylinderindividuelle Z¨undwinkelsp¨atverst KW
95 dwkrz_7 zylinderindividuelle Z¨undwinkelsp¨atverst KW
93 dwkrz_5 zylinderindividuelle Z¨undwinkelsp¨atverst KW
90 dwkrz_2 zylinderindividuelle Z¨undwinkelsp¨atverst KW

89 dwkrz_1
92 dwkrz_4
94 dwkrz_6
91 dwkrz_3

0 is cylinder 1 (first) or how can I understand which is which cylinder?

for example like bank 1 cylinder 1, 2, 3, 4?
I don't have label file with written under Cylinder 1, cylinder 2 e.t.c

I hope you guys understand what I am looking for.
also attached logs.

thank you very much!
Maybe any thought about air mass?
I will try to do logs with ME logger.
Car is MY2000. Do I need to wire straight K-line from OBD to ECU?

Hello,

may i ask if you have found a solution to this ?
A friend of mine just bought a 2000 s6 with AQJ Engine.
The car doesn't feel like 340hp, so we logged some channels.
Air mass looks very jumpy. Is it Ok as it is a NA engine ?
Anyone an idea what could be wrong ?

best regards,

buergi

edit: attached .csv

thanks for your quick reply, i attached a csv.
We made some 0-100k/h tests with a cumulated weight (car+driver+passenger) of about 2100kg. 9s to 100km/h....

buergi