S3 8L N75 Need help

[artu]

Hi,

i have s3 8l and i think something wrong is with my N75, because duty cycle starting to drop down from 3000rmp. Maybe someone can look at log file and tell, is there N75 faulty or car is mapped in wrong way?

Thanks for help.





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[<tuffty/>]

Fairly normal for duty to drop... its high before and during spool then drops down to control boost required to meet load request. .. ME7 ecu's only make enough boost required to meet the load request. .. this will vary with engine conditions and other air temps etc... boost will rise in the summer and drop in the winter

<tuffty/>

 

[artu]

Thanks <tuffty/> for the answer.

So you think car works properly, or there is need to change map/n75 on the car, because from 2700 -3000 rmp car accelerates very well but when n75 drops down from 95.3 to 75% i realy feel that car become slower, especially on 4,5,6 gear?

 

[s3dave]

May be do the N249 delete?

 

[artu]

Hmm, it really can help?

 

[artu]

Hi,

maybe someone can tell what is wrong with boost? At start it feels like overboost than something like limp mode. Maybe its N75 faulty?

Need help