Thanks Ricky Bobby,

I think I am getting to the point where I am going to have to take the intake manifold off the car to check the more hidden vacuum lines. Not really looking forward to doing that.

I need to try my mechanics stethoscope and see if I hear anything.

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2001 3.0 X5 5M - 227k - "Station Wagon according to the great communist state of IL"
1995 M3 5M - 230k and waiting for a new head gasket
1988 325i Auto Convertible - sold
1992 318i 5M Convertible - sold
1992 325i 5M Convertible - sold
2001 330i 5M Convertible - The more money I put in, the better it gets...
1998 K1200RS - Done all 48 Contiguous States, looking forward to Alaska at some point in my life