Sounds like you are in the right place.
Does the car feel considerably slower then usual ?
It sounds like it could be one of a few things :
The BCS is not working or the pipes to/from it are blocked therefore the boost control is not bleeding way the boost from the actuator so you are only getting actuator pressure and not ECU controlled pressure.
The Green diagnostic connectors are connected under the dash.
The MAF is knackered and dropping the boost (seen this a few times on the early classics). Cleaning the MAF can help but it normally gives the same problems a short time later.
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