I suggest to check the following:
1. Battery voltage
2. Fuel pump voltage
3. check the vacuum hoses that connects blow off valve, fuel pressure regulator, map sensor...
4. check the fuel lines under the car (if they are in good shape)

I believe that 10s and 11s at low speed is too much (very rich), when at high load you see 14s then probably the fuel pressure regulator doesn't work correct or the vacuum hose that connect the regulator with your inlet manifold is disconnected. The last thing is that you have raise your boost above fuel&boost map and the car doesn't know what to do.