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      10-08-2010, 10:46 AM   #6
dre_2ooo
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Drives: '12 135i
Join Date: May 2010
Location: Minneapolis

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Uhhh.... it has a VACUUM line, so under heavy VACUUM it should shut (ie. in gear during deceleration....) which means you can't see it shutting at idle or when the car is off. I think it's to help prevent afterburn or something.

You'd have to strap a camera to the bumper and then drive it up to 25mph in 1st gear, then let off the gas while leaving it still in gear, then review your footage