Hi does anyone know what the correct Bosch spark plug is for a 11 plate 1.25 petrol fiesta mk7 - looked on the euro car parts site and Halfords and it suggests HR 8 MCV+. I've tried the NGK TRB13B in my 09 1.6 petrol Ford Focus but they seem to have a black sooty deposit on them when I replace them.
The info for the HR 8 MCV+ says 'Electrode Gap(mm) 1.0, 1.3, Thread Length(mm) 25' so what is the gap - 1.0mm or 1.3mm?! When I go to the checkout on euro car parts it says that the spark plug is not the right one for the fiesta presumably because it doesn't recognise a 1.25 fiesta engine.
So in conclusion which is the right plug and gap for both the fiesta and focus?
The info for the HR 8 MCV+ says 'Electrode Gap(mm) 1.0, 1.3, Thread Length(mm) 25' so what is the gap - 1.0mm or 1.3mm?! When I go to the checkout on euro car parts it says that the spark plug is not the right one for the fiesta presumably because it doesn't recognise a 1.25 fiesta engine.
So in conclusion which is the right plug and gap for both the fiesta and focus?