trouble with my juice w/attitude

[fluemasterjr]

i have had my juice with attitude now for about three weeks and love it but the last couple of mornings i have had some trouble with it. the out side temp is 20f and the motor has warmed up to 180s but when i set it to level 5 and floor it, it will go for about 2 sec and then the motor will cut out and die if push the clutch in and restart it will i got two trouble codes p0483 cooling fan and p2146 low voltage to group 1 fuel injector the other thing is that before this happened i could not build more than 26 psi of boost now i am up to 32 psi without the boost elbow the truck is a 03 2500 with 6 speed k&n mbrp 4'' with juice w/attiude