My turbo'd 5.0 is running super rich (wideband reads 10) and I can't figure out why. My setup is an On3Performance turbo setup with 42lb injectors(on3), walbro 255 fuel pump, and Pro-M blow-through MAF, and moates QH. Its tuned with BE/EA by Premier Performance in South Jordan, UT. The IAT, ECT, and TPS numbers don't change beyond their base values upon starting the car. You can rev it, let it warm up, and they still don't change. TPS doesn't go beyond .98 and doesn't change if you push the pedal. I replaced the fuel pressure regulator and it has two new HEGO's as well. What I find odd is when you start the car cold, AFRs start at stoich then it leans out a little more and then inches its way to 10:1. I got a 42 and 92 on KOER (big surprise there huh?). I will run another KOEO to see what it spits out and post them when i have more time. I'm getting extremely frustrated with this car so any help would be much appreciated.