2004 Dodge Stratus

2004 Dodge Stratus Sedan, 2.4L, Auto

When at idle and any strain is put on system, car jerks randomly every few seconds and rpm drops and comes back up. This especially happens when the A/C or defrosters are turned on. It feels like a misfire to me, but I'm not getting a Check Engine Light. I tried to remove the Spark Plugs to check them but the wires won't come out. I'm don't know what to do besides sit and scratch my head.
September 7, 2007.

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