items to check/change.. if you havent already

pressure reg
phase sensor (in dizzy cap)
Water temp sensor (blue one by the dipstick)
ACT (brown sensor in the inlet manifold)
MAp sensor

also try different injectors

maybe worth looking at the fuel pump/relay but im guessing pressure reg isnt shutting off and is flooding your rail/injectors


it can only be one of two things...

a part faliure or a signal faliure to your injectors