Feb 17, 2009 · A4 (B5 Platform) Discussion - EPC Light/Irregular Boost problem completely fixed.WooHoo! - While I was replacing the N75 valve (I believe it was the latest F valve) and the Pancake 034 PCV valve, I noticed the tubing connecting the N75 valve to the little nipple on the turbo housing was almost completely severed. Sep 11, 2009 · With N249, the ECU routes vacuum reservoir vacuum into DVs for the -14inhg to about 0psi threshold (it is really based on load instead of pressure I believe). This is to open the direct path from Y-pipe to throttle, omitting turbos. Turbos are not needed until you want positive pressure which is above 0psi. Jun 2, 2016 · I guess i should have mentioned i literally put the new turbo in a few days after buying the car bc the wastegate on the k03s was gone. But the whole n75 valve set up is new to me im used to my previouse dsm set up. But everything i pull up on the n75 valve makes it sound as though the previiuse owner mighy have it in wrong but i cant find a pic. Jul 2, 2013 · S4 / RS4 (B5 Platform) Discussion - 2001.5 s4 boost issues - n75 maybe? - Having some boost issues with my 01.5 s4, was pulling misfire codes and changed plugs, switched coil packs around and had no luck, finally last weekend I removed my fuel rail and replaced the O rings on the injectors, fixed it right up! Jul 28, 2005 · Audi A6 / S6 / RS 6; Audi A7 / S7 / RS 7; Audi A8 / S8; Audi Q3 /Q5 / Q7 / Q8; Audi R8; Audi TT / TT-S / TT-RS; Other Audi; Audi e-tron; Technical Discussion. Electronics; Engines; Wheels & Tires Discussion; Performance and Tuning; Suspension Tuning Discussion; Brakes Discussion; General Car Discussion. Auto Detailing Discussion; Audi Euro Nov 22, 2018 · Running the MBC in conjunction with the N75 will not allow you to increase the boost. It will only let you reduce the boost. If you want to eliminate the spike set the MBC for 15 psi. If you run the MBC by itself I don't think you are going to like the results. OAre.

audi a4 b5 n75 valve location