2.0 TDi Not Holding Boost
My 2004 2.0tdi 140 was remapped on saturday.
The original rr said it was only making 126bhp and after the fast road map it as making 155bhp.
The guys at chip n spin said it was not holding boost. So they run it in 5th gear to make it boost and got 163bhp (sttill not great).
It had a recon turbo fitted about a month ago, and for about a week afterwards it would stutter under acceleration. Then it all seemed fine until yesterday.
Does anyone have any ideas what would cause it not to hold boost?