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Fitted a manual boost controller the other day, also disconnected the pipe that leads to the gizmo under the car and blocked both sides. Now if what i have done is correct why am i getting lower boost than normal with the controller closed and around 0.7 bar when opened??? any ideas. it's boosting less than it was without it fitted??... surely if it was hitting fuel cut then it would splutter or something? This dosent..... with the controller open my boost gauage reads less than without it. .. with out the controller im hitting just under 1 bar with the controller i hit much less,you then have to re adjust your mbc to your desired boost level .
...make sure the valve is the right way round! From what I can remember, the long side of the valve goes to the turbo, and the T side goes to the actuator. If it's the wrong way round, you won't get full boost. 
robsgts wrote:tvsv has nothing to do with the boost mate
"TVSV Turbo Vacuum Switching Valve"(cheap i might add) it wasnt boosting properly. With a little investigation I discovered that the electrical connector on the TVSV was disconnected.
