think he means crypton tune lmao
for anyone who doesnt know, this is when some idiot who doesnt have a clue about cars come round and basically set your engine to the settings it would have had from (factory)day one lol when new
so what this then means if you have had any mods fitted or say youre engine is on 120000 miles it will run like a bag of spanners (being polite) due to not being setup for the car and mods/mileage
could also make it lean or pink etc... you get the idea then BANG
just my experience lol