Dodge Dakota persistent rough idle and misfires every two months despite new coils, plugs, and injectors on Dodge Dakota

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Dodge Dakota owners report experiencing persistent rough idle and misfires, even after replacing coils, plugs, and injectors. These issues may be linked to an old fuel filter that has not been replaced, which can contribute to rough idling and misfires. Additionally, the condition of the ignition control module is crucial, as it significantly impacts engine performance. Owners should also inspect for vacuum leaks, which are a common cause of rough idling in these vehicles. Ensuring that spark plugs are in good condition is essential, as misfiring can lead to further rough idle issues. Problems with catalytic converters can also result in rough idling, making their inspection necessary. Furthermore, a cracked PCV hose may cause similar symptoms, and worn piston rings can lead to poor combustion, exacerbating the rough idle. Addressing these factors is important for diagnosing and potentially resolving the engine performance issues in the Dodge Dakota.

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