Ok, according to what kev wrote in fetts thread my coil is definately wired wrong
in my pics the + coil terminal is facing the front but has white/black wire and ecu feed attatched
Just incase, here we go again!! Based on the workshop manual for Lucas constant energy ignition system as found on 3.9 and 4.2 RRC.
The ignition system is really quite simple, there is a supply (battery), ignition coil and ignition amplifier - that's it! No really that is it.
The ignition supply is the white wire : should show battery volts when ignition switched on. This wire goes to coil +ve
The white wire is split to give a supply to the ignition amplifier.
Also attached to the coil +ve is a capacitor, I can't remember the reason for this but it is an original feature.
The white with black wire should be attached to coil -ve and goes to the ignition amplifier, this wire is also split to go to the engine ecu to give the engine rpm input signal.
That is the ignition system.
In terms of basic checks/tests try the following:
Ignition switched ON
Batt +ve to Batt -ve should be min 12v.
Batt -ve to coil +ve should be batt volts -1v
Batt -ve to coil -ve should be batt volts -1v
Ignition amplifier ground (one of the mounting screws) to earth = 0v - 0.1v
To check amplifier switching:
Ignition off : Batt +ve to coil -ve = 0v
Ignition on : Batt +ve to coil -ve = 0v
Crank engine, volts should rise. If not amplifier is goosed.
Check pick up coil resistance:
Remove ignition amplifier from distributor, measure resistance between the two plugs that the amplifier pins go in to. Resistance should be in the range 2k ohms to 5k ohms
So now you know