CONTENTS
DEFECTIVE INSULATOR OR ELECTRODES
SHINY YELLOW OR TAN COATINGCONTENTS
FAULTY
COMPONENTS
ACCESSORIES AND MISC.
SPARK PLUGS
WET, OILY COATING
CONDITION(S)
- SPARK PLUG ELECTRODES COVERED WITH WET, OILY COATING
POTENTIAL CAUSE(S)
CHECK THESE FIRST:
1. HIGH ENGINE OIL LEVEL
Reduce engine oil level if necessary.
Install new spark plug(s).2. LEAKING PISTON RINGS
Have piston rings professionally replaced.
Install new spark plug(s).3. LEAKING VALVE GUIDES
Have valve guides professionally replaced.
Install new spark plug(s).CHECK THESE NEXT:
4. SCORED CYLINDER WALLS
Have cylinder walls professionally repaired.
Install new spark plug(s).5. CLOGGED POSITIVE CRANKCASE VENTILATION (PCV) VALVE
Replace PCV valve.
Install new spark plug(s).CHECK THESE LAST:
6. RUPTURED MECHANICAL FUEL PUMP DIAPHRAGM
Have mechanical fuel pump professionally replaced.
Install new spark plug(s).7. CLOGGED CYLINDER HEAD OIL DRAIN HOLES
Remove engine sludge.
Install new spark plug(s).IN EVERY CASE, REPLACE YOUR SPARK PLUGS.
CONTENTS DEFECTIVE INSULATOR OR ELECTRODES SHINY YELLOW OR TAN COATING