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Ok i dont recommend you drive the car too much when the light is flashing this indicates the engine is not running on all cylinders , more then likely you have a faulty ignition coil these are very common to cause your faults and the running rough condition . I hope this helps . Please dont forget to provide feedback for the help provided thank you
In this motor there should be a single coil per cylinder more then likely ignition coil in cylinder #4 has failed . I hope all this has helped please dont forget to provide feedback/rating for the help thank you