Misfire on all 4 Cylinders. 2003 Honda Civic Si.?

  • Thread starter Thread starter Tha-Kidd
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Tha-Kidd

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I got a 03 honda civic si. And it has been running really crap like. So i parked it. Got out an OBD2 kit. And i was given these codes. Cylinder 1,2,3,4 Misfire P0301 P0302 P0303 P0304. Random Misfire P0300. Please help me. Thanks
 
Have you ever replaced he spark plugs? If not, that's the first (and cheapest) place to start.

My 2000 prelude did the same thing...It would run, but bogged down, had a flashing CEL that indicated the same codes, and it turned out to just be the plugs.
 
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