like the subject states.

i have a msd btm that i bought off ebay, and turns out it crapped out on me.

the tack bounces and it missfires, i have tried two ignitors, switched my wires and replaced my distributer cap. then i wired the tack to the neg of the coil just to see if it jumpped, and no it doesn't, but the motor still misses. so i have concluded that the msd is effed.

oh i also grounded it to the battery, and there aren't any shorts. i wired it like it's supposed to be i checked that a million times.

the msd makes a little squelling noise, instead of it's usual ticking.

does anyone know where i should take it to be repaired?

chris