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Searching for some help…tuned Q50 via EcuTek…engine blew a while ago (bearing failure metal shavings in oil pan). Dealership replaced entire engine…tune was on previous engine…a while after engine was replaced I started experiencing a random intermittent sputtering problem. Sometimes it would do it for A week straight then not again for months and has been completely random….when I brake and vehicle downshifts and then try to accelerate (it happens around 2000 rpm) it will sputter for a few seconds and then drive normal. Only does this when I brake, then accelerate around that rpm range…tuner said the tune they do looks perfectly fine but I did a log and captured it when it sputtered…I have a screen shot of it on my phone…my tuning shop is backlogged for months and dealer won’t touch it now that they’ve found out it’s tuned…any help would be much appreciated …