This should get you in the ballpark...sounds like your PUPs are too close to the strings.....
Measurements for both front and rear PUPS are the same. While depressing the E string at the last fret, measure the distance from the bottom of that string to the top of each PUP magnet for that string. Adjust for a distance of 4/32 inches. Do the same with the G string but, this time, aim for a distance of 3/32 inches. As the p PUP is split, the two inner adjustments would have to be measured 4/32 inches from the A and D strings respectively, while depressing those two strings at the last fret. Final adjustment may have to be made to the G side by ear, so that the volume is even across all strings.
Cheers.
