your fuel psi at idle should run 30psi to 35psi , how many miles is on your truck and how long has the sc been on . as the boost psi runs up it bring up the fuel psi to add more fuel ( higher then stock witch puts more load on the pump ) if your pump is week it will run fine as long as you are not under boost and will lean out as the psi goes up ! this can burn a piston ! you need to get it checked !!!!! you may wont to ask Tone if he can find out from Alpine Developments what the fuel psi should be under boost ( 45psi at 1psi of boost ,50psi at 2psi of boost ??? ) so you can check it yourself
hope this helps