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Hello, My engine has been running lean with high fuel trims, the LTFT being at 20.3 and STFT being atleast 15% or greater on idle. I looked over https://mazdaspeeds.org/index.php?threads/raiders-p2187-on-a-2007-mazdaspeed-3.6984/ and decided to take it to a mechanic. They did a smoke test and...