I decided to fit my boost gauge yesterday and as the turbo timer already T's into the vac pipe from the dump valve I decided to T into the same pipe. Which I did. But the boost gauge doesn't work and also the DV has stopped working and the boost gauge on the Turbo Timer only shows vac of -0.10 bar at idle where it used to be -0.70 bar. Under acceleration it is now not boosting anywhere near as hard as it used to. So this would make me think there is a boost leak somewhere. But I cannot for the life of me find it! :@:@ This is driving me insane!! Any ideas??