Modded 2000 t4 s40 issues

Randomly ended up with a t4. I know absolutely nothing about this car except its not long rebuilt, has a hybrid turbo, big front mount, doesnt seem to have a bov anywhere, no boost controller or bleed valve and runs off cylinder 1 until warm. Basically a swedish metal box of confusion currently. Is there anything common fault wise i can troubleshoot? Also is the standard ecu capable of a map? Ive no idea of volvos this is my first. But used to petrol turbos. Cant see anything that stands out.. any ideas folks? Help would be greatly appreciated. Thanks