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What causes OBDII codes 302 and 304 with check engine light and cylinders 2 and 4 misfire what causes this in a 4.0L SOHC Ford Explorer?
Wiki User
∙ 18y ago
P0302 Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected I suggest you replace all spark plugs, and plug wires. When you purchase the plugs and wires, tell the parts store the codes and ask them to reset the light after you install the parts. See where you stand after the repair. I would also run a compression test on all cylinders to see if you possibly have a burnt valve or blown head gasket, which is unlikely, unless you have symptoms of overheating or missing, especially after you replace the above items.
Wiki User
∙ 18y ago
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