Msd problem

How are you testing the system out of the car? Are you using an MSD tester, and an distro machine to spin and test? Are you using the same coil wire testing out of the car as you are in the car? Are the pickup wires polarity correct? Did you spark plug wires test good? @Newbomb Turk has a good video on Craptube but I don’t remember his page.

Any chance the pick-up coil is wired backwards?
Not that I can tell. Works fine at higher rpms not at lower