400i (1980) ignition module substitutes?

My 1980 fuel injected manual transmission 400i died while I was driving down the road at all of 25 mph. Coughed once and quit.

All diagnoses point to the igniton module. Fuel injection system is working o.k. I have good compession, distributor rotor turns o.k. Coil checks out o.k., etc.

But no spark.

Looked like a Crane MSD ignition could substitute for the Magneti Marelli module (P/N AEC 104 BK) o.k., but no luck when I hooked it up.

Any suggestions on substitutions, or other diagnosis tips would be greatly appreciated.

Thanks much.

Bonnieboy
Poolesville, MD