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All COBB Tuning AccessPORT for 135i Discussion Here
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05-20-2012, 05:24 PM
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Ihave1
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I cleaned my valves at around 46K miles and it made a huge difference in the hesitation I was feeling. It was very noticeable. I have not tried the 4.01 beta maps yet so I cant say for sure if that could be your problem or not.
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