My car has been running lean when I step on the gas all the way. At least I think it's running lean because my exhaust temp is reaching 900. I changed the fuel filter and ran some injector cleaners, but I think the problem is with the MAF sensor. I cleaned the sensor with MAF sensor cleaner, but it didn't help. I'm running VF34, STI injectors, K&N filter, Walbro fuel pump, and Ecutek reflash. The ECU reflash was about 3 years ago, and I haven't done anything else to the car since then.
On the bright side, since I can't really step on the gas, I'm getting 26 MPG.