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.Google+
Car Problem Reports
Dodge Neon Carbon tracking on spark plugs may cause misfires
Dodge Neon Problem
Model Year Affected: 1995
Engine Affected: 2.0L 4 Cylinder
Visitor, 1995 Dodge Neon, 2.0L 4 Cylinder
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.