Hello all,
I have issue with HPFP on my EA113 with DAZA Turbo.
Setup:
RS3 Injectors - new from dealer
RS3 LPFP with RS3 module - new from dealer
DAZA Turbo - used one
S3 intake cam - new from dealer
HPFP - new from dealer
VIS Internals HPFP - new one Stage 1
175b FPRV Dynodrome (initialy 165b unknown and rs4 140b)
Forged Engine

Car was tuned by very famous polish tuner. The day i picked up from tuner the car it was starting very rough, a lot of black smoke on wot (like TDI) and randomly stuttering/jerking at 5-6k RPM. We did logs that showed Pressure on HPFP drops from requested 140b to 125b on wot and then car Stutters -> he told me go home buy new HPFP ->no changes.

By this time i changed FPRV to 140b RS4 and friend adjusted the soft to request 130b -> Puff car is working perfectly like a charm but requested was 130b while during wot i was getting even 135b. Because of Rs4 valve we had to decrease boost due to lack of fuel.
I bought brand new Dynodrome FPRV 175b and all the problems are back We changed only valve, soft was untouched and i have issues with stalling and jerking 5-6k rpm.
It happens even without boost just open TB a little bit on 1st gear to get to 6k rpm and Puuf it stalls. We spent 1 year and still cant solve this... Tuner told me that i lack fuel but i should be able to put 600hp on this fuel system. Dynodrome told me that we cant make a good soft and valve is good...

RS4 valve Fuel Logs
http://vaglogi.pl/log-002_230_231_ulOPC.html

165B Valve Fuel Logs
http://vaglogi.pl/log-002_231_230_H0uCBi7.html

Im waiting for 175b Dynodrome Valve logs but i bet they same as 165b. As you can see 130b is like a wall and when 130b is achived it starts to fall and then car sttuters and Rail goes up

A friend of me had the same Problem Same Car same specs … but it was a horrible tuner rpm was limited to 6500 rpm also same Problem like you discribe… did you have a error code in your ecu becuse of fuel? I dont rember the error code … but its not a Hardware fail its a Software fail of your Tuner … really that issue is one to one the same like a friend had he changed the tuner and problem was solved …


Gesendet von iPhone mit Tapatalk

I mean if it stalls on idle revving the engine, then you have some shit with the tune.
Maybe stopping to use VCDS and using a real logger can help you, so you can actually see what is going on.

Stop this shit and log the car properly... thread is waste of time until you do.

I agree with sven77 's previous post.
Your problem lays on the intake cam lobe for the HPFP.
It rotates slightly and as a result you experience fuel pressure overshoot.

Take the camshaft out and check the lobe for correct alignment.
I always weld the lobe after repositioning.

Guys, dont look at missfires i had bad head springs but now i have bar-tek springs so no more missfires. Injectors are new oem rs3 from audi dealer as all other parts are new, nothing is used one.
My intakae cam is new from audi dealer from s3, we did not touch the lobe.

I dont have car at this moment and tuner is not sending me any logs (asked several times).
I sent the newest one i have. This issue is with me for one year and only on RS4 Valve the car was running ok.
Guy who build my car said that Dynodrome Valve i have is broken and it should work without any software changes.
130b specified rail on 175b valve and car is stalling/jerking (can send video), swap to rs4 valve and works perfect.