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Try simply unplugging the MAF and see if it idles and drives better. Cleaning the MAF is kinda of a bandaid fix, I think in the end it'll still need to be replaced. Also try spraying something like carb/throttle body cleaner around ALL the vacuum lines. I don't have the pics on my computer, but there was a pre-molded hose that went from the brake booster to the intake in an "L" shape on my 7. It had a crack probably half the circumference of the hose, but I wasn't able to see it till I bent the "L" the other way, and there she was.
Keep us posted.
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650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex
600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's
135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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