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05 dodge stratus check engine light on. I changed spark plugs and wires. Idling hard. Code readings 303,400,100,48. I filled the gas tank just before it started acting up

Vehicle: 05 dodge status 2.4 16 Valve overhead cam

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The misfire if you have P0400 this is the EGR, a open EGR at idle will cause a rough idle , You may be able to take EGR out and clean it for any carbon that may have cause it to stay open

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