You're welcome

Also the proper non-resistor spark plugs are no longer made for this car. I have the same engine as you (3.0 version) and I have to buy new old stock plugs from ebay.

Do you have the updated camshaft in your engine? 1989 was the update year for the M103 engine and the small flange that drives the ignition rotor cracks and can sometimes break off completely on 89 and newer motors. Its a cheap small part to replace if you have the updated camshaft.