Are you running stock plugs at the stock gap? When tuned you have higher cylinder pressures, which makes its much harder for the spark to jump the gap. Which fries the coil packs overtime. Common issue when tuning.
I’d recommend replacing your plugs and probably coil packs and running a tighter gap on the new plugs. Probably .022 ish.
Common problem if you haven’t tightened the gap is killing coil packs and misfires in a tuned engine.
Happed to me on the 11 gti I had with a k04 turbo upgrade.
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