Ok guys recently had new turbo put on and tune on 13psi makng 240kw's and loving it, the other day I was just cruising in 4th, then (for whatever circumstance) dropped into 2nd and flattened it. After this looked in my rear view mirror and there was a massive puff of black smoke, and driving seemed to bit flat... long story short, it now doesn't seem to be making much boost. It still spools and I can feel it start to pull but after hitting 4k it kind of just flattens off and has NO top end power.
So, doing a bit of research on this forum some guys have complained of melting metal cats so took that off and had a look and doesn't seem to be 'melted' at all so I'm assuming it's not that. Also had a look at all intercooler pipes and doesn't seem to be any cracks or loose fittings.
Could this be a spark issue? Coilpacks?
I understand black smoke is overfuelling problem, but has only happened that one time and has not been smoking at all since... and having an aftermarkt ecu I would assume the tune would take care of and r n r issues. Also like to add that exhaust note has changed, seems a LOT quieter than previously.
Really starting to upset me, any help appreciated!