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  1. Engine Performance
    I have an 03 wrx with a lean code that popped up. I got the car smoke tested and the only leak we found was under the maf sensor on the housing, so I bought a Perrin maf housing and put it on. When I drive AFRs are normal, but when I stop for any reason they go up to 17afr-18afr-19afr. I have...
    lean code
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