Wrangler L6-4.0L VIN S (2000)
cylinder wear can cause wet fouling. In new or recently overhauled engines, wet fouling may occur before break-in (normal oil control) is
achieved. This condition can usually be resolved by cleaning and reinstalling the fouled plugs.
Oil or Ash Encrusted
Oil or Ash Encrusted
If one or more spark plugs are oil or oil ash encrusted, evaluate engine condition for the cause of oil entry into that particular combustion chamber.
Electrode Gap Bridging
Electrode Gap Bridging
Electrode gap bridging may be traced to loose deposits in the combustion chamber. These deposits accumulate on the spark plugs during
continuous stop-and-go driving. When the engine is suddenly subjected to a high torque load, deposits partially liquefy and bridge the gap between
electrodes.