Yeah I would definitely like to have it 100% but I don't have any other way of having it tested, unless you have suggestions..
The car was being tuned and with a couple of other small faults, he said there was a loud hiss with high boost so I'm trying to find it, it was originally thought to bbe around the intake runners but with the compressor and some soapy water I think I've eliminated that, I found that I accidentally put the check valve in the wrong way for my carbon canister solenoid so I fixed that which was making noise with a bit of pressure from the compressor. I'm hoping that was it if not it must be this tb. I don't think I have another option other than back to the tuner