CONTENTS
WET, OILY COATING
CLEAN, WHITE, OFTEN-BLISTERED INSULATORCONTENTS
FAULTY
COMPONENTS
ACCESSORIES AND MISC.
SPARK PLUGS
SHINY YELLOW OR TAN COATING
CONDITION(S)
- SHINY YELLOW OR TAN COATING ON PLUG INSULATOR
- MELTED DEPOSITS COULD ALSO APPEAR LIKE BUBBLES OR BLISTERS
- PERHAPS ACCOMPANIED BY PLUG MISFIRING
POTENTIAL CAUSE(S)
CHECK THESE FIRST:
1. IMPROPER DRIVING HABIT (HARD, FAST ACCELERATION)
Avoid harsh accelerations; alter driving habits.
Install new spark plug(s).2. EXCESSIVE VEHICLE LOAD
Reduce vehicle load.
Install new spark plug(s).CHECK THIS NEXT:
3. LEAN FUEL/AIR MIXTURE
Have fuel/air mixture professionally enriched.
Install new spark plug(s).CHECK THIS LAST:
4. SPARK PLUG HEAT RANGE TOO HIGH
Install new spark plug(s) with lower heat range.IN EVERY CASE, REPLACE YOUR SPARK PLUGS.
CONTENTS WET, OILY COATING CLEAN, WHITE, OFTEN-BLISTERED INSULATOR