1999 Plymouth Breeze spark plugs fouling out

Problem & Possible Cause...................Action

Carbon Fouled Plugs
Clogged Air Filter......................Replace Air Filter
Incorrect Idle Speed.................Reset Idle Speed
Faulty Ignition Wiring................Replace Ignition Wiring
Sticky Valves/Worn Valve Seal.....Check Valve Train
Fuel Injection Operation.............Check Fuel Injection

Wet/Oil Fouled Plugs
Worn Rings/Pistons........Overhaul/Replace Engine
Excessive Cylinder Wear....Overhaul/Replace Engine

Plug Gap Bridged
Combustion Chamber Carbon Deposits.............Clean Combustion Chamber

Blistered Electrode
Engine Overheating...........Check Cooling System
Loose Spark Plugs.............Clean/Torque Plugs
Over-Advanced Timing........Reset Timing
Wrong Plug Heat Range......Install Correct Plug

Melted Electrodes
Incorrect Timing............Reset Timing
Burned Valves...............Replace Valves
Engine Overheating........Check Cooling System
Wrong Plug Heat Range....Install Correct Plug