Continued on the inspection and trouble shooting of the 420 today,after cleaning the ICV,and reinstalling it,I found that the Idle was even more erratic than before.
The fuel pumps are holding well and not lousing power so we are OK at this point with the pumps and relay.
Resistance in the plug wires are of course to high,I found #5&#8 to stand at 0 ohms I suppose when they go they go just six months ago I checked all that and they read 3 ohms tried another meter just to be sure.
Well I will continue as the work progresses,by the way another ICV is on the way.