B4000 SE Cab Plus 4WD V6-4.0L OHV (1997)
Spark Plug: Testing and Inspection
Inspection
Spark Plug Inspection
Spark plugs
Check the following points. If a problem is found, replace the spark plug.
^
Damaged insulation
^
Worn electrodes
^
Carbon deposits
If cleaning is necessary, use a plug cleaner or a wire brush. Clean the upper insulator, also.
^
Damaged gasket
^
Burnt