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Old 01-10-2013, 07:30 PM   #19
dmax
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Join Date: Aug 2006
Location: NJ
Posts: 23,516
My Ride: '99 328i 300K miles
Have you looked at our exhaust flap? I don't have one, but I hear they rust closed...and there's some famous mod with a golf tee that I haven't heard about in a while...probably for a good reason! But, have 3 of 4 02 sensors with signal to ground problem seems odd...I wonder if it's because half your exhaust is closed...and maybe doesn't open up?

Worth a peak up them.
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