Hi Guys,
recently replaced turbo on my 03 volvo s40 1.9. Also replaced the maf and boost control valve and cleaned all other parts connected.
Recently took back the car from mecanic. it turned over really smooth and drove really well for 10 miles or so. Without warning the power fell off and it limped back to the garage. Accelerator to floor only revs too 3000rpm. Mecanic troubleshooting it and it appears that the new boost control valve it toast.

Could do with some sound advise from anyone with any ideas, running out of patience.