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  1. Calling all fuel trim experts!

    General E46 Forum
    Hey guys, I've been chasing a fuel trim issue for quite some time and need some expert help. I'm including a lot of data, so hopefully it will accelerate and narrow the areas of investigation. The facts: 1999 E36 M3(not an e46, but the same basic rules apply), 96k miles, Supercharged via AA...
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