Hi, I recently bought the car listed above. I am using it as a project so I can know more about cars inside and out. One code keeps popping up that is P0304 cylinder four misfire. So far I replaced all spark plugs all spark plugs wiring, idle air control system, distributor cap and rotor. I changed my oil to full synthetic using now premium 91 gas. But the check engine light keeps popping up as fourth cylinder misfire! So now am stuck an do not really know what is the next diagnosis or step to fix the problem. Can anyone help me?
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Monday, March 5th, 2018 AT 6:50 PM