forker.jon Posted July 27, 2014 Share Posted July 27, 2014 i have a vvti 6 speed and i am only getting a max of 0.5 bar boost on the first turbo and normal boost on the second eg 2nd or 3rd gear if i accelerate ill hit 0.4 or 0.5 boost below 4000rpm on first attempt if i try a second time eg 5 to 10 seconds later im lucky if the boost gauge goes to zero so far since this started trying to figure out whats wrong Ive changed almost all vacuum hoses on the turbo side (first turbo) also i can sometimes hear the sound of someone letting the air out of a balloon while pinching the bit you'd fill the balloon with im thinking of putting the factory recirculating valve back into the car and taking out the dump valve anyone with any advice on what to look for or suggestions on what is the problem would be a great help thanks john Quote Link to comment Share on other sites More sharing options...
MattP Posted July 27, 2014 Share Posted July 27, 2014 The stock-bpu VVTI supra is not supposed to have a vent to atmosphere BOV fitted it messes with the maf sensor. Although I doubt that's the main problem,what did you change all your vac pipes too? Silicone? Quote Link to comment Share on other sites More sharing options...
forker.jon Posted July 27, 2014 Author Share Posted July 27, 2014 yes i changed to silicone hoses Quote Link to comment Share on other sites More sharing options...
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