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i have a code 302 confirmed its still shaking. on 2007 Ford Taurus

i was told i have to let it cycle 150 miles for it to reset and stop is this true or do i need to do more work to fix the misfire. i have changed all spark plugs and cleaned the throttle body.

Asked by for the 2007 Ford Taurus
Have a mechanc repair the misfire on cylinder # 2, if it is still misfiring, it will not clear up until fixed! After repair, the codes can be cleared to turn off the light.
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this vehicle has wires so it may be plug wire. also this car has a history of the coil dropping cylinders so get it to a shop that can put it on a scope to see if it is a wire or the coil.