Lost PSI on Turbo Boost

How to Isolate Low Boost Problems

Usually if your wastegate is stuck open you wouldnt get 12psi. So, id say thats not the prob. but, what makes me wonder is when you disconnected the vac line to the wastegate why you didnt get more than 12psi. When i disconnect mine and i have a stock ecu i can get 15psi very easy. I still think your problem is somewhere around there ( basically a mechanical prob. )

Lost PSI on Turbo Boost

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