Found a snapon ethos scan tool that would talk to it and fault came up with phase sensor, (cam sensor?).
Have tested sensor with LED on trigger wire and is working. Check the sensor off the old engine and configuration is the same. Im now thinking that position of sensor between alloy top and plastic top engine may be different, OR there is more than one gap in the sprocket on the later engine? Will have to pull covers off to check.
Update on hunting, was unable to purchase idle valve, or I could ex Italy $800, via the agents or a Bosch one $450 plus $150 freight bill.
So had another look and used a screwdriver to move the spindle and managed to get it to move, the more I played the more free it become, now is back in vehicle and is now constant idle at about 900rpms.