tru...i had a 98 supercharged gs-r and had the "MSD" setup (blaster ss coil, distributor cap/rotor, wires, and 6a-l).....i had almost the same problem you had but worse it would even struggle at idle and even cut off.......you changed the coil but i don't think thats the problem.....my problem was the MSD distributor cap and rotor......i took it off and the contacts where just gone and worn i was sparkin on maybe 2 cylinders and the other 2 once in a while or not at all (engine dying and shutting off)......replaced both and problem went away.....and you have to change the cap and rotor both they're not too expensive i paid about ~$60 for both parts at my performance store around here