Hello @ all,
please apologize my English, I do my very best I´m really new here but all topics I read about were very well documented! Thanks for this!
I could step into reading out the ECU´s flash, understanding Tuner Pro and ME7 Tuning Wizard and finally I was able to flash the ECU.
Nevertheless I´m facing some issues.
I bought the car (S3 8L APY) incl. tune, but didn´t know that it´s tuned.
The car had many problems (as usual for old 1.8Ts) which are actually solved. But know the car have an overboost issue.
At ~70% throttle and up to WOT there is no regulation of boost pressure. In VCDS I´m always seeing 95% WGDC despite of exceeding requested boost by ~400mBar and more.
1st I thought it´s the N75, so bought a new one.[/img] Result: Always seeing 95% WGDC @ thottle > 70% but actual boost bearly reaching requested boost.
So my opinion: The car was tuned while it had some issues like boost leak and so on and the tuner just tried to reach 260hp some how. Now all issues are fixed and the regulation is confused.

I attach the readout tables from the tuned ECU. I already changed the last two rows of IMX back to stock because they were completely at 95.00.
I assume that the PID is maxing out. But if so.. Why?

Can anyone give an advise, based on the pictures?

Thanks and BR
Martin

Hi,

I´m sorry, just had not the chance to log anything because it just overboosted. I had a look on S4 Wiki again and re-checked KFLDIMX.
In my opinion x-axis didn´t fit to the setup. I know, it´s not wanted to post screenshots.
I just post these in case anyone has the same issues.
Now I will try to fine tune and if I get further issues I will reply reasonable logs.

Here we go. I hope these logs are okay for the beginning. All three are the same pull in 4th gear.
I guess, the car has a knock issue... But why?
The Inj on time is at the limit too. --> But I have installed adjustable gas pressure regulator and wideband lambda. (AFR is at ~11,8 @ 5600upm)
I´d go this way:
1. going ahead with KFLDIMX
2. Ignition KFZW --> check x-axis and lower some values because KFLDIMX was a little increased (1,3 to 1,55Bar)
3. Fueling

Do you need mor infos? What´s your opinion? Where should I start? Should the maximum value of the x-axis meet my calculated maximum value (e.g. load in KFZW ends at 185 --> max load actually set to 209 in LDRXN)

You did not post a single log, only more useless screenshots.

I´m sry I didn´t get that I have to put .csv-File in the thread.
Attached are some pulls in 4th gear. Please tell me, if other values should be logged or if should change the way of logging.

I´m not sure where to start. There are some issues, but what should be improved first?
- I could improve the boost rising over the target
- I could improve the ign timing

Which air mass is the real one which is also displayed in VCDS? There are two/three different values which I logged. But 160g/s seems to be a little bit low and 260g/s quite high.

you opened and saved that log in a way that is it somehow fkd. propably excel?
i fixed it and had a look. there is not much to see because you dont know how to log and what to log.

have a look here to identify missing variables
http://nefariousmotorsports.com/forum/index.php?topic=9362.msg83008#msg83008

log 3rd gear wot from 2000 to redline (if possible)
in your current log you are out of fuel below 5000 rpm

Hi at all,

today I logged three pulls. I put in all values which were requested in other posts. I hope that´s ok.
Please, be so kind and have look on it. I didn´t start far below 2500upm and went not higher then ~6000upm.
It feels strong, but not good. I'm a little afraid of breaking with rods. I can't really judge the performance.

If your opinion from the log is that´s okay to go from 1800 to 6800, please let me know.

Thanks for the comment.
I already lowered the timings, so I will lower them again.
Regarding injecors... I installed adjustable fuel fuel pressure regulator and AFR display as I didn´t know what the tuning is doing.

So next steps:

- Lower the timings?
- Adjust fuel map to higher fuel pressure? - KRKTE?! - But for KRKTE I´d need the adress