2006 Civic Ex P303
I've got a 2006 Civic Ex 1.8l with 127,301 mi. I keep getting P303 cylinder 3 misfired detected. I've changed the plugs once and coil pack 3x's. I really don't know where to go next and hoping its not the pcm. Any ideas what it maybe?
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welcome to the forum. check the compression in the cylinder using a pressure test. there may be leakage from the intake or exhaust valve or rings causing the P0303 code.
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Originally Posted by acmech52
(Post 25970)
welcome to the forum. check the compression in the cylinder using a pressure test. there may be leakage from the intake or exhaust valve or rings causing the P0303 code.
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