when i attemp to sweep picking some licks. on lower strigs (ead).first i put my finger and pick the note. the problem comes after this. when i release my finger and do the rest of the lick i produce some overwhelming noise. is this normal in high speed sweeping or do i need to change my technique?
Try muffling the high bass strings or strings that arent used wif you palm coz the resonance from the lower strings will make the bass (EAD) strings to rattle. Thus producing the unwanted sound.
^What he said.
you might be doing a pull-off while moving your fingers to another position
get a new broom?