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  1. MazdaSpeed3 Stock Issues
    2009 Mazda speed 3 with 62000 miles, a few basic bolt ons, and accessport. I’ve been dealing with a misfire on cylinder 1 for a few weeks now. I’ve done a compression test which is 165-170 across the board. Changed plugs and coils. Changed upstream o2 sensors. Put in new Maf. New map as well...
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