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Re: '13 Mazda 3 with constant P0303, cannot feel misfire
Posted to Technical Discussion Forum on 8/15/2019 5 Replies

I had trouble getting good pictures of the valves with my camera back when I cleaned them, but I got a decent before and after of one of em. They were all funky, with #3 definitely having the most "growth".

[Valve Cleaned]

[Carbon Valve] Login to read more.

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