Hi A bit of an update on this post. I've changed the turbo, the replacement one was very noisy when it was revved past tickover, so I'm going to put the old one back on, I've given it a check over and it passes all the checks I've read about. So we'll see.
I've done a live data test with my launch device, I'm aware that they don't read the P38 as reliably as the nanocom but it is showing an EGR valve fault. I cleared it but it reappeared after a running the engine again. Anyone successfully tested the EGR valve insitu?? There's some carbon and gunk on the stem. But I'm going to put a vacuum on the unit tomorrow and see what happens unless anyone says otherwise.
Ta