Hi everyone,
I have a problem with my ford focus MK1 1.8 TDCi (2002).
When I have the clutch pressed and use the throttle to get to constant rpm after a little bit they drop from 2000 to 1250-1500 and after 3/4 seconds everything returns normal. In the first 3 gears, the ones that I use the most, when I lightly press the gas pedal to slowly accelerate the car has some hesitation with some hiccups. The problem do not happen when I floor the gas pedal. Fuel filter and spark plugs are new.