Dodge Neon Problem Report
Dodge Neon Carbon tracking on spark plugs may cause misfires
The engine may develop misfires when accelerating up a grade or when carrying a heavy load. This can be from carbon tracking that has developed on the spark plugs causing the plug to not fire (misfire). The engine will run roughly and lose power.
have gone through three sets of plugs in a 6 month spand plugs become carbon coded. then begin to misfire. has caused egr to stick open and show that i have a vaccumm leak. replaced egr leak went away. cleaned plugs replaced wires and set plug gap to 0.35 problem still occurs. - Visitor
Spark plug tube seals fail, causing the tubes to fill with engine oil and the engine to misfire. As a result, the engine may run poorly and fuel economy can suffer.
What is the cause of oil covering the spark plugs?