1998 Honda Civic • 4 cylinder 4WD Automatic • 151,000 miles
Hello, Yesterday my check engine light went on. Then today it went off. So i decided to check the codes. I got p0300, p0301, p0304. Ngk iridium plugs and ngk wires installed a few months ago. Dizzy is about a year old. Any suggestions? Also im getting hard starts and rough idles on cold starts like he last few days in a row. It was idling like it was on 3 cylinders.
Those are misfiring codes and it could be spark plugs, plug wires, distributor rotor or fuel pressure or injectors.
Most likely you have compression leak with one or more cylinders. Get a compression test done with a cold engine.
And what would that mean if it had a compression leak. Is it hard to do a compression test if i rent it from auto zone
That wuld mean a bad head gasket which would result in coolant looses and the misfiring.
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