MBC lines

[asshanson]

I don't think it would matter if it's hooked up to the J-pipe or the compressor housing, should be the same pressure either way. If the boost controller worked before, I'd say it was hooked up right and the problem is elsewhere.

Do you have the SSQV adjustment screw too far in so that it's leaking at higher boost levels? Is the BOV vacuum line still hooked up right?

What do you mean by it started going crazy? Won't hold boost/fades? Or doesn't limit boost and goes past 25 every time?

If it doesn't hold boost, could be a leaking problem with the SSQV. If it doesn't limit boost, the MBC could have broken, coincidentally at the same time as the BOV change.