right guys some of u may no my bro sold me a apexi boost controler avcr old school one nick a td fitted it for me it gave up the ghost on test run sooo i got a manual one works perfect but i recently had got a hdi boost controler off ebay 120pound from japan all it needs is a postive and negitive to work then vac hose and plum the solinoid in aswell soooo done all that theres power going to the unit and going down the line to the solinoid there continunity on the solinoid lines aswell but when u go for a run in the car it boosts at 9psi turn it up nothing happens and u can turn it all the way up still nothing same if u turn it all the way down thort i may of had the plumbing wrong but switched the pipes round still nothing anyone shed any light on this should i just send it back for a refund or get another one? surely its brand new it cant be buggerd the apexi one i had off my bro cost me 130 this cost me 120 and im no better off