All Things Mk5 > Performance Modifications
Fuel pressure deficiency...
jhook661:
--- Quote from: Dan_FR on November 21, 2016, 07:37:31 pm ---If the fuel pressure is good then why are you running lean? Logs? You know the fuel request is adjustable, right?
--- End quote ---
I'll put some logs up this week and what do you mean by adjustable ? @Dan_FR
Is there any other reason why it would run lean if it's fuelling correctly, I'm confused :ashamed:
Dan_FR:
Revo software allows the specified fuel request to be set by the user/dealer. If you are running lean then I would suspect the software has not been set correctly or you have a hardware issue. Will know more with some decent logs
pudding:
--- Quote from: jhook661 on November 21, 2016, 06:54:55 pm ---I'm having similar issues too I'm Revo stage 3 k04 conversion the car on full boost after 4K is dangerously lean so the ecu is pulling it back and mine has all new parts
Fuel filter 6.6 bar
Loba hpfp
Rs4 return valve
Brand new s3 injectors
No boost leaks or vacuum leaks either
Fuel pressure is good too
And top of all this the idle is shocking to it hunts and choughs but revs never drop or fluctuates :thinking:
--- End quote ---
Your last sentence is typical of a blown front PCV. Might be worth checking / replacing it.
jhook661:
Pcv valve has been checked, I'll do some logging on rail pressure and boost etc give you guys some idea but I'm not as knowledgable as you guys on the vcds
ROH ECHT:
--- Quote from: Pudding on September 28, 2016, 10:44:42 am ---Is the lpfp controller OEM or aftermarket?
Certainly looks like the problem is in the lpfp area, which I did steer you in the direction of in my first reply :smiley:
--- End quote ---
Been a long while...only now saw this and realized I never finished it.
After going through this all, and going back and forth with GIAC, I finally figured out the GIAC Dealer had loaded the incorrect file. And this was after having replaced the OEM LPFP__LPFP control module__S3/Golf R - injectors__both pressure sensors__HPFP and internals...etc. etc. etc..
I appreciated all of the time, thought and energy you all spent on this with me.
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