"My intention was not to loosen the injector pipe but when the injectors were changed the pipe wasnt quite tight enough thats when it started then i realised it was shooting out diesel so i turned it off."
This is not what you posted originally ! " i then loosened one of the fuel injector pipes by a fraction and it starts but sprays fuel out "
We need facts and honesty to help you.
"If you dont KNOW how it works, don,t try to test or fix it"