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Audi S3 8P - Direct Injection Pressure problem
Posted: Thu Jul 29, 2021 2:18 am
by mcassab
Hello, I have an Audi S3 8P and I am having problems controlling Fuel pressure.
I dont use Closed Loop AFR when tunning, after I finninsh I turn it on.
In naturally aspirated condition, when I reach 5500 rpm fuel pressure goes up instantly from 40 bar to 180-185 bar.
I look everywhere in Scal and I cant find a solution ( probably is in there but I cant find it)
I attached a pic of my problem and also my tune file.
Any help is appreciated.
Re: Audi S3 8P - Direct Injection Pressure problem
Posted: Thu Jul 29, 2021 10:31 pm
by nmerdan
I had a similar problem - try taking out 5-10 degrees in Direct Injection Pump Control -> Synchronous Pump Control -> Pump 1 Storke Start Angles and program the ECU afterwards. If the problem still persists, please send logs with relevant items included, like all the sdip1* items (Base, KI, P, etc.)
Re: Audi S3 8P - Direct Injection Pressure problem
Posted: Sat Jul 31, 2021 9:10 pm
by mcassab
nmerdan wrote: ↑Thu Jul 29, 2021 10:31 pm
I had a similar problem - try taking out 5-10 degrees in Direct Injection Pump Control -> Synchronous Pump Control -> Pump 1 Storke Start Angles and program the ECU afterwards. If the problem still persists, please send logs with relevant items included, like all the sdip1* items (Base, KI, P, etc.)
Thank you. I will test the car and let you know.
Re: Audi S3 8P - Direct Injection Pressure problem
Posted: Wed Aug 04, 2021 10:40 pm
by mcassab
nmerdan wrote: ↑Thu Jul 29, 2021 10:31 pm
I had a similar problem - try taking out 5-10 degrees in Direct Injection Pump Control -> Synchronous Pump Control -> Pump 1 Storke Start Angles and program the ECU afterwards. If the problem still persists, please send logs with relevant items included, like all the sdip1* items (Base, KI, P, etc.)
An update in my problem... I have done what you suggest and the problem continius, in a different way but it was still there. So I proceed to change the HPFP with anotherone and the problem was solved. Aparently was in the regulator.
Thank you for your help.