I have a re-wired walboro 255. 95% of the time i can't hear it at all. and when i do it's very faint. im also getting alot of knock in the higher rshared_pm range. logger shows 0 until about 4k then it will rapidly start climbing from 7 counts and up. this is on a 14b with only 14psi. is it possible my fuel pump is faulty? and just to eliminate most comments about what it could be: the car is religiously maintained, boost leak tested to 25psi, ignition is tiptop.