Hi, new to this forum so hope I'm in the right place....
I'm glad to be part of a new forum after coming from a Bmw forum...

Just got a Audi A3 2.0 tdi (bkd) engine
And Idle is very ruff.... The rev counter doesn't glitch when idling ruff....
And it's also goes into limp mode now and again when I put my foot down...

I have changed the wiring harness ( common problem I've been told)
Changed glow plugs same time
Full service
Recent egr valve (new 1 before I bought car)
I've checked it's clean..
And the valve under the egr valve I've also replaced...

I fitted a egr blank plate and the idle wasn't as ruff.... And I found strange is the blank was in for 800+miles and there was no carbon build up on the plate whatsoever ever!?

I removed plate and the idle went back to worse...

I'm out of money to book it in to get sorted so any advice would be great as I want this car sorted ASAP as I use it daily for work...

Many thanks in advance and do hope this forum is as good as the Bmw one for helping issues...

Thanks again👌👍