PIP3433D: SES Light and Sever Engine Misfire On Cylinder 1 And 4 or Cylinders 2 And 3 - keywords ICM ignition miss module no P0300 P0301 P0302 P0303 P0304 plug repeat replacement spark.
Replace ICM and plugs
It is very important to OEM spark plugs. A blinking engine light means failure is catalytic damaging. A misfire in this Engine WILL kill the cat , so don't drive with missfire