I have been through quite a few MBCs lately trying to figure out what is wrong. I had a dual stage MBC and it worked great up until last week. I have recently borrowed other single MBCs to try and see what the problem is, however, I cannot get any to boost above the 0.8bar stock boost from my Tial Wastegate. I am wondering if it is my Wastegate and not my boost controller but I wanted to shoot an idea a friend told me to try to see if it is correct.

The first picture is how I have ALWAYS hooked up my MBC, both dual and single styles.

The second picture is how he said I should hook it up. "Bleed Off Style" he called it.

Neither method lets me control the boost but the ladder of the two yields a higher boost level.. Any guesses on what is wrong?