On your MAF and in neutral with literally no engine load, what is your g/s on your MAF holding the engine RPM at exactly 1000 rpms? What about at 1500 rpms. Then what about at 2000 rpms.

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2003 BMW X5 3.0i -- MT5, 3.64s final gears, H&R lowering springs, K-Mac bushing kit
2007 BMW X3 3.0Si -- MT6