04 td4 turbo problems

Hi
My 04 td4 recently suffered from loss of power at above 70 and the eml would come on, I took it to a local tuning specialist who hooked it up to his machine and came back with a file full of graphs and claimed the turbo was shot at and was only boosting at a third of normal pressure. So since then I have had a new turbo fitted,maf sensor ,egr valve, crank case breather filter and a battery? However I feel it's still sluggish in low gear especially when you need power eg pulling into traffic on a roundabout and has started cutting out when first started.
Can anyone give any pointers as to the next thing to try could it be the boost solenoid ?
Cheers.

Would have been better spending your money on a diagnostic session, which may have pointed you in the direction of any faults rather than changing things in the hope it sorts things.

biggeeeee said:

Would have been better spending your money on a diagnostic session, which may have pointed you in the direction of any faults rather than changing things in the hope it sorts things.

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£250 for the diagnostic session, his directions doesn't seem to have solved the problem however the eml doesn't come on at over 70 anymore!

You said Tuning specialist, you didn't mention diagnostic.
What machine did he hook your vehicle up to?
£250!

I don't know.
But the report said to
De-Coke the system
Replace inlet pipes
Faulty maf sensor
Turbo boosting -30% needs replacing
Total cost £2800 approx, for the first 3 items It would have been £850 +vat, needless to say I did this for a fraction of the price and got some on with a ramp to help with the turbo. I think the guy with the diagnostic was more interested in the R8 and the GT3 that had come in that day.