i bought my car supercharged running anywhere from 5 to 9lbs of boost, depending on belt condition and alignment of starts and moon.
anyways i have a walbro 255 and im running about 45psi at idle which according to my narrow band is pretty rich. at whatever my max boost is that day it sits at 100psi which maxes out my guage so maybe more? also the narrow band says its rich through boost. ive been going through fuel pumps this is my second bad one since i got the car in april. im thinking this extra psi throughout idle and boost is the reason why im killing fuel pumps as they simply cant keep up. so im wondering first how do i find out what FMU i have and what one i need to make my car run a little bit better. i have a wideband i might install but what numbers should i be looking for?