Me and a mate have just put a 1.7 puma engine in his w reg zetec s fiesta.

we have replaced the engine loom with a puma one too. the fiesta has digital clocks and 2 plugs in the under bonnect fuse box and the puma loom is the same.

we have everything plugged up but when you crank the engine over it will not start. there is No spark and the injectors don't fire. I plugged my OBD machine into it to read the data and as soon as you crank the engine over the OBD machine losses its connection untill you stop cranking.

From this i can only expect that when cranking the engine over the ecu is losing its power feed or something along thoughs lines.

anyone have any ideas?

thanks

mike