90 EagleClaw
20+ Year Contributor
- 35
- 0
- Oct 20, 2002
-
NY
I have a 90 Tsi with a stock 14B turbo and injectors but with a 255 pump. Before when I had the stock MAS in my SAFC settings were all under +10% and I was able to run 18 psi on pump gas with little to no knock. Now I have switched over to a 2G mas and upgraded intake pipe and I had to richen the AFC at high throttle as much as +35-50%! And I am getting knock now at 15 psi where I had 0 at that boost with the 1G mas. My fuel trims are 118 100 118. And the car is running leaner then before even with the AFC settings increased that much. How could the 2G mas have made me need soo much more fuel? Or is there another problem maybe?