1100 fiesta 1996 N reg My Daughter boiled the engine and blew the head gasket.
When I filled it with water and turned the engine over it shot out of the filler so I replaced the head gasket and the engine runs but there is a flash and a Bang from the injector about every two or three seconds it runs lumpy and smokes like mad out of the exhaust. The bores are ok the flashing in the injector I don't understand.

any ideas ?