Your Question:
I have a 1997 GMC Saffari Van that keeps bringing up the P0304, misfire in cylinder 4, code on my OBD II reader. I have already changed the spark plugs, spark plug wires, distributor cap, and rotor. I am lost as to what my next step would be in order to fix my problem. I am also getting a generic code which says that the misfire that occurs is a random misfire in Cylinder 4

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