i recently got my car back from the tuner and he noticed some fluctuation in my boost. so i was told to perform a turbo boost leak test but cant seem to find any answers on where to perform said test. the factory turbo inlet is still in use, aftermarket charge pipe and blow off valve. when i put air into the system at the turbo inlet air began to leak out of the blow off valve. with the top mount intercooler i can pressurize it after the blow off valve but im not sure that checks any of the items i need checked for leaks. just need advice? also the blow off valve is the turboXS hybrid BOV. it has those washers that come with it to adjust for idle, not sure if the BOV is supposed to leak or not before reaching 20psi where i was testing it.