Right guys i finally give up on this thing, i think it's all down to flooding but im not 100% sure.
if i clean the plugs it will fire but wont keep running, after turning it over for a minute with no joy it will briefly fire on the back turn of the key, plugs then need to be cleaned again (soaked in fuel).
ive changed the fuel pump, fuel metering unit, cold start valve, distributor and the plenem chamber.
any suggestions would be very grateful, cheers Kev