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Exhaust is very sooty at the rear,removed 1st oxygen sensor to make sure if cat was blocked it would do away with that problem,but even with that out it still had the same problem also tried swapping cam sensor but this also had no effect
it is a customer vehicle and he says it hasnt been changed since he has had it ,it has 27000mls on the clock,I will change this now and take it from there,cheers
the fuel filter in the 2010 Focus is a permanent fixture inside the tank so it is not quite as simple as an in line filter and would obviously be an expensive and time consuming part to change