Bill thanks for the reply only just got back from working away
Well it was a case of brain fade on my part and over confidence with the 16 sz
what i was actually doing was pushing the curve the WRONG WAY !!!!
this i realised late one night nothing better to do 200 miles away
what i actually did was bin the un wanted points of curve which left 3 as you so rightly say top middle bottom.
i dropped the middle point to 35/40 the bottom point was at 30 turned on the ignition operated the switches hey presto it worked spot on
Thank you for your input - without guys like youself supporting muppts like me loosing the plot
thanks again you are a star