I have a 2008 gsr sss and I'm having trouble building boost. I have brand new oem ngk plugs, 1000cc dw injectors, dw 65c fuel pump, tbe, fmic, wide mouth downpipe. Stock turbo stock internals. For some reason I can't build over 10 psi and my car feels super sluggish and sometimes my motor will even cut out like it's stalling when I wot. I've checked all vacuum lines and checked for boost leak and there's no issue's. Idk what else it could be