Problem was resolved with 4 new NGK plugs, purchased at Autozone. Bucking/stumbling is gone. Thanks again! -Dave
Thanks all for the quick responses! I will return these plugs and buy from a reputable source, plus follow advice regarding no low RPM to WOT Do...
First a little background: I'm the second owner (bought Aug '22 with 155k miles) of 2012 MS3 with Cobb Stage 2, tuned, HPFP. Turbo blew within...
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