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Thread: Code P0303

  1. #1

    Default Code P0303

    I'm new to the forum so thnx in advance for any help you guys can give. I have a '99 Honda Accord that's idling rough. I put a scan tool on it and got the P0303 code. Checked and changed the spark plugs and associated wires. Sure enough the number three cylinder is not firing. The spark plug wire is firing on number three but I noticed when I changed the spark plugs that particular plug looked to have little to no wear like the othe plugs. My question is could it be that fuel injector or something else. I'm wondering how that one cylinder has no fire at the spark plug when there is fire coming from the spark plug wire.

  2. #2


    I would check for intake leaks as it can cause P0303 error.

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