Hello people. I seriously need advice and assistant here on my car.
I have a problem with my AFR's. The car is running K16 billet turbo's and one bar waste gates. 3 Inch Inter Coolers, 630cc injectors. After market exhaust and a 911 tuning ECU custom tune from Markski Tuning. I have fitted a new fuel pump, fuel pressure regulator, new fuel filter, check all the vacuum lines and hoses. Did a boost leak test with no leaks and my car is still running lean at the WOT. See attachment for log. Any advice would be much appreciated as I don't know what else to do

 

The first thing to do is reach out to Markski. He can/will diagnose the problem in a logical/scientific way.

 

I concur, probably best to start with Marski. It is his tune, he will be able to provide a detailed list of things to check in order