i have a focus 1.6 zetec se on a 53 now this car is treated like a god! oil and filter every 3k full service every 6k but just lately its being a pig!
when im cruising it sometimes loses power like sttuttering and then the power comes back its not missfireing on idle and ive put my works scanner on the car and there are two codes stored one saying not all obd11 checks are complete and the other one says a fuel level malfunction.
theres no split air pipes and the only thing i could here was a slightly noisey air like sound from the red fuel pressure regulator return pipe.
the second fault is ive been getting a really strange smell from the middle heater vents inside the car it does come and go and the fan works perfectly on all its settings, ive yet too pressure test the coolant system but i did find today that the bootom radiator hose is slightly weeping because its a metal unit and corrosion on the hose and rad caused an imperfect seal.

any help and advise would be great!

many thanks tony!