Plse help

My turbo starts up every day even when cold on 1st go but when im 10 minutes+ into the journey the rev's die along with the car usually when i slow down, then it will not start again for about 20 minutes.

Ive had new leads, a new dizzy cap & rotor arm and recently a new fuel pump fitted but its still doing it so much so that im driving around in a shed at the mo

Any advise would be gratefully received as the bf wants to sell my 'beast' if its not sorted soon

LouRs x