following Stu's advice I spent today My Wifes Birthday hunting for more voltage on the car I started by putting new earth straps on for both battery to body and battery to engine, this gave me Altenator 14.1V altenator with earth on battery 14.1V battery 13.7v various points in the car 13.6v fuel pump 13.68v SECS monitor 13.3v all readings hot idle all electrics off. I then decided to check what voltage I was getting in and out of the relay that switches/ powers the ecu 13.6 volts, I then traced the supply wire to the ecu and found it to be interrupted by my imobilisor circuit! I think I have my 0.3V and will check tomorrow. Any ideas why I see 14. at the altenator and 13,7 at the battery, I have removed the altenator terminal and cleaned it all and the same for the other end, also checked the resistance of the wire which showed 4 ohms. Do I need to replace the wire from the altenator to the battery?