#1
i watched lots of video's and stuff i got the technic(i think) but when i play hammers ons and pull offs on the low e and b string they dont sound good, i can barely get a sound for the hammer on and when i pull off u hear nothing what is causing this

i have a epiphone les paul with EMG pickups

a roland cube 20x

a metalzone mt-2

and 11-48 string(ernie ball)
#2
Finger strength. With those EMGs (are they active?) you shouldn't need a whole lot more before you start hearing anything. Just sit there with a metronome and trill for a little while every day and eventually it won't be a problem. But when you pull off make sure your finger plucks the string. You won't get sound if you just take your finger off.