escort backfires after 1/2 throttol changed the plugs phase sensor crank sensor water & air sensor 3bar map sensor its running on green injectors fuel pump and filter i noticed that the plugs are black like she is overfueling and down the plug hole it seems to look wet on top of the piston i don,t no what chip has been fitted as it was done 7 years ago it has a sticker on on the window saying superchip could it be the chip playing up or does any one have any suggestions and if any body no,s someone down in s/wales that deals with cosworths so that i can contact them thanks