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      04-09-2015, 09:03 AM   #5
casper83
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Drives: M235i XDrive
Join Date: Jan 2015
Location: Wisconsin

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I've had similar issues. Car ran great on map 1 with no issues. I installed the BMS intake and ER catless DP, went to map 2 and have had several engine stumbling, lag and surging issues. Going back to map 1 did not correct it. Looks like I'll be taking the intake off and see if it helps.
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