Diesel Bombers - Please helpppp

okay so i am running unusually low boost for my set up as you can see in my sig. I can only see 20lbs. Here is the kicker, no leaks no waste gate thought maybe my tst pm3 and smarty were both doing boost fooling and fucking each other up. Well i was just trying to see if maybe my boost gauge line was kinked or some thing of that nature because the truck still runs really good. I could not find where the boost gauge was hooked up to, anyway i was looking under the dash for some odd reason and found that the previous owner neglected to tell me it had a banks big hoss system so i knew that does boost fooling so i looked closer at the map and sure enough i had the big hoss plugged in the the pm3 then plugged into the map sensor. When i unplugged the big hoss and directly connected the tst pm3 i lost my pyro and my boost gauge. I cant drive it right now because im in the marine corp and cannot leave right now but is there anyway that this banks system was keeping me from building boost? or is the boost gauge that is hooked up to the map just not accurate? IDK any input on this would be greatly appreciated.:jump: