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Was it the ground wire near the DME's that wasn't secured? I ahd a few issues after I did my coils and plugs. I think I had to unplug and plug the DME harnesses and tighten the ground about 4 times before my M6 stopped giving me issues. My wifes 550 is in at our very trusted indy shop for a similar issue. They can find anything and are suspecting that fuel blend or ethanol might be at play. Not sure if you guys on that side of the pond switch blends at summer time but we have a summer and winter blend in the states sometimes the transition is problem free but we have noticed issues in the past that coincide with the blend change.
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2015 F06 M6 Silverstone Metallic II, Individual Full Leather, B&O, Night Vis, CCB, RKAutowerks (CP Rods/Pistons, DI Cams, CF Intakes, Coated DP's & Billet Diff Brace), InfinityAuto Turbo Inlets, Mishi Oil Cooler, JB4, XHP S3, BM S3
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