I am getting P0172 running rich bank 1. It is a series II 3800 sc from 00 gp. The car is running fine as far as I can tell but I think I am getting poor gas mileage. I believe I read the 3800sc swaps are getting around 18mpg and I am only getting about 14mpg no matter how I drive the car. What should I check first to resolve this code? I do have the torque app with the Bluetooth connector if it can help to find the problem have not used it yet. thanks for any help.
