Removal and Installation
NOTE:
The door glass must be completely raised.
The screw must be fully disengaged from the door lock cylinder bezel although it is not necessary to fully remove the screw.
Loosen the rear door exterior handle bezel screw.
Slide the rear exterior door handle rearwards to release.
Remove the rear exterior door handle.
Ford Focus Spark Plug Inspection
Inspect the spark plug for a bridged gap.
Check for deposit build-up closing the gap between the electrodes. Deposits
are caused by oil or carbon fouling.
Install a new spark plug.
Check for oil fouling.
Check for wet, black deposits on the insulator ...