Guys, my father in law's 2010 tdci focus has black smoke, power loss esp in inclines and difficulty shifting gears. What could be the cause of all these? Had oil change several months back. Any ford non-casa recommendations?
Is the car well maintained? Dirty filters (air & fuel) could bring up the symptoms you mentioned.
Is the car modified? Check for boost leak.
K&N oiled filter could also foul up your sensor.
Check if your EGR needs to be cleaned.
Black smoke means more Fuel and less air, so check your air filter.
Hopefully, its not turbo or injector issue
When my Uncle's Starex CRDi had power loss, he took it to Berrima. They established the baseline power on the dyno (it dropped to somewhere between 20-40 WHP!) then they worked back from there until the car made nearly 80 or 90whp. You can try to check them out as well.