Grand Voyager V6-3.0L VIN 3 (1998)
Spark Plug: Testing and Inspection
Dry, Fluffy Black Deposits - Cold or Carbon Fouling
Normal Operation And Carbon Fouling
Symptoms: Dry, black deposits on the electrodes.
Possible Causes:
-
On one or two plugs, may be caused by sticking valves or defective spark plug cables.
-
On the entire set, may be caused by a clogged air cleaner.
-
Poor Ignition Output
NOTE: Cold fouling is normal when the vehicle is only operated for short periods. The spark plugs do not reach a high enough operating temperature
during short operating periods to burn fuel completely.