Prowler V6-3.5L VIN G (1999)
Chipped Electrode Insulator
Electrode Insulator
A chipped electrode insulator usually results from bending the center electrode while adjusting the spark plug electrode gap. Under certain
conditions, severe detonation also can separate the insulator from the center electrode. A sudden rise in tip temperature or severe operating
conditions are also possible causes. Spark plugs with chipped electrode insulators must be replaced.
Fuel Fouling
FUEL FOULING
A spark plug that is coated with excessive wet fuel is called fuel fouled. This condition is normally observed during hard start periods. Clean fuel
fouled spark plugs with compressed air and reinstall them in the engine.
High Speed Miss
HIGH SPEED MISS
When replacing spark plugs because of a high speed miss condition, wide open throttle operation should be avoided for approximately 80 km (50
miles) after installation of new plugs. This will allow deposit shifting in the combustion chamber to take place gradually and avoid plug destroying
splash fouling shortly after the plug change.
Normal Operating Conditions
NORMAL OPERATING CONDITIONS
Normal Operation And Cold(Carbon) Fouling
The few deposits present will be probably light tan or slightly gray in color with most grades of commercial gasoline. There will not be evidence
of electrode burning. Gap growth will not average more than approximately 0.025 mm (0.001 in) per 1600 km (1000 miles) of operation for non
platinum spark plugs. Non-platinum spark plugs that have normal wear can usually be cleaned, have the electrodes filed and regapped, and then
reinstalled.
CAUTION: Never attempt to file the electrodes or use a wire brush for cleaning platinum spark plugs. This would damage the platinum pads
which would shorten spark plug life.
