I have done fairly extensive diagnostic, I did not share above because of my focus on the N75 duty cycle. I have had many audi's and the N75 duty cycle has always been an option but not with the S6.
answers:
1. 2013 Audi S6 Prestige
2. Modified - EPL Stage 3, SRM 4mm+ hybrid turbos, APR downpipes, APR intake cooler
3. Autoscan included
4.Issue: car is EPL tuned and I am running about 20psi but should be seeing 23psi. Every once in a while I'll get a P0299 after a few long Full throttle runs. It takes a bit for the to register the boost deviation. I have triple checked all vacuum lines ( I even pulled the front clip and removed the intake manifold and manually vacuum checked the lines including ) The lines held vacuum for 2+ hours with a hand pump device.
Therefore, my hypothesis is that the solenoid is not opening enough.
Diagnosis steps:
A. GOPRO Wastegate actuators under full throttle run
RESULT: Wastegate arms creep open
B. Vacuum Test wastegate lines at idle
RESULT: Roughly ~ 10 – 11 in Hg
C. Test source vacuum (with gauge while car running)
RESULT:~ 22 – 25 in Hg - This was tested near the vacuum pump and downstream of the solenoid
D. Remove Charge cooler/ Intake plenum & smoke & vacuum test all lines (with mechanical hand pump)
RESULT: Pass - vacuum held
E. Replace Pressure converter solenoid
F. Vacuum Test wastegate lines under full throttle run
RESULT: ~ 10-11 in Hg under normal operating
RESULT: ~15 in Hg under full throttle/ boost conditions
Wastegate vacuum tests were conducted with factory tune and the vacuum amount was same as with tune. The vacuum amount was enough to hold full factory boost - no P0299.
6. I am trying to identify what duty cycle the wastegate control solenoid is operating at. Most guides refer to block 114 for N75 logging but I have no such block available in my advanced measuring options. In searching the list within , it appears I have no duty cycle option for the solenoid. What am I missing?
Code:
Chassis Type: FC-AU57 (4G0)
Scan: 01 02 03 05 08 09 10 13 15 16 17 19 22 28 34 36 3B 3C 42 44
46 47 52 53 55 56 5F 62 6C 72 82 84 85 8B 8E 8F 90 A9 BA
VIN: WAUJ2AFC5DN077510 Mileage: 105022km-65257miles
01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
13-Auto Dist. Reg -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
28-HVAC, Rear -- Status: Malfunction 0010
34-Level Control -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
3B-Sensor Elect. -- Status: OK 0000
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: Malfunction 0010
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
82-Heads Up Display -- Status: OK 0000
84-Night Vision -- Status: OK 0000
85-On Board Cam. -- Status: OK 0000
8B-Adaptive Cruise 2 -- Status: Malfunction 0010
8E-Image Processing -- Status: Malfunction 0010
8F-Pretens. Frt Left -- Status: OK 0000
90-Pretens. Frt Right -- Status: OK 0000
A9-Struct. Borne Sound -- Status: OK 0000
BA-Motor Mounts -- Status: OK 0000
