Newcomer

Hi all, I'm new to the site and I'm looking for help in diagnosing a problem I av with my td5 ( bet uv heard this before lol) , it starts fine and runs fine until u ask it to work hard - its ok when ur accelerating but as soon as u ease off it acts like uv turned it off at the key for a couple of seconds then it powers back in and bellows smoke out the exhaust and she is away again until next time u need to
Boot it- if u take it steady it won't do it! , iv changed the low pressure pump in the tank and it's still the same- bin told it could b the fuel pressure regulater but just thought is ask u guys if uv come across this problem - cheers!

injector washers letting exhaust fumes into fuel system.
oil in ecu plug common as well
get faults and live data read on nanocom

well spent 5hrs yesterday swapping parts from a donor td5 and still not sorted the prob- its goin for a proper code read this week and il wait for the results - the only thing iv not done yet from peoples suggestions is the injector seals !