I'm looking for some help with my sweep picking. Most of the lessons & tips I've come across over time usually seem to be for people who already know the basic proper technique for this, but what I'm looking for is the BASICS of sweep picking. By now I know dozens of arpeggio shapes, but getting them to sound crisp, clear & up to speed is still eluding me.

Some questions:

1. How do I prevent the notes from running together in a barred arpeggio shape.
2. What exactly should I be doing with my right hand? I'm completely confident in my left hand's speed, but getting both hands synchronized is a bit of a problem. No matter how slowly I do it with a metronome, the moment I start speeding up, my right hand starts doing something completely different than when I do it slowly.

Any tips would be greatly appreciated.