ok so the other day i was wondering about boost well my truck puts 13-14 psi they are having a problem with it being lean the a/f is 14:1 they did the custom tune and couldnt get it below 14:1 and they said that i would need a new fuel pump is this correc? how many of you have put pullies on and how far will a stock fuel pump go? i dont want to spend all this money if i dont have to