Dodge Repair Questions? Ask a Mechanic for Answers ASAP
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I have seen a lot of issues with these engines involving worn/corroded distributor cap leads with symptoms exactly like you have described wherein the engine will only misfire at high rpms...have you had the distributor cap changed or at least looked at yet? if not, I would suggest pulling it off and looking for excessive white buildup on the eight leads inside. Also, check the rotor button in the center closely for wear and black marks.