loss of power, no idea

Bloomin p38 is punishing me big time, iv'e just changed out all the airbags, rebuilt the compressor, fitted a new exhaust and was even thinking of washing it! when i got given a mission to go to Tesco's and get some frozen parsnips, "make sure there frozen!" its a long story, anyway i digress, as i was purring along at 50mph there was what can only be described as a popping noise followed by a loss of power, i limped into Tesco and had a look under the bonnet, but i couldn't see anything wrong, all fluids are ok and she rev's up perfectly in park, no clouds of smoke, i got me veg and headed for home, the beast is definetely down on power and appears to be making what i would describe as a "wooshing" noise this only seems to happen under load, i can't find anything wrong, i'm thinking auto box or turbo but i'm not sure how to test either? all suggestions gratefully received, its a 96 2.5 dse

How much were the parsnips?

It was Tesco's, so they cost a bloody fortune! especially if it cost's me a gearbox or a turbo!

I'd follow the pipes out from the turbo. Have any pipes popped off? I'd expect lots of black smoke out the back if you floor it though.

As Grrrrrr said turbo pipes would be first on check list if its down on power and making a whooshing noise, hose split , popped off or intercooler split
get some one to rev it up while you look under bonnet should be easy to spot.

Thanks guys, i will try and have a look tomorrow, need to get the old girl back on her feet, iv'e got some long journeys coming up in the next couple of months

Grrrrrr and brian38dse a big thanks for your advice, i checked it today and found that one of the turbo pipes had come off, i cleaned it and fitted two new clips and it seems all ok, thanks for your help