From the little I know about coils - they are essentially two bits of wire wound around each other - the primary side has less windings than the secondary side. So with the coil disconnected - perhaps a continuity check will help?

If not have a look at this:-

http://autorepair.about.com/od/troubleshooting/ss/coil-test-ohm.htm

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!