I've lost count of the number of times I've gone to my laptop to buy that rear ARB, but I drove the car round the block to get a parking space outside the house, and I'm getting some power delivery issues, so might have to save my money... No EML but when I accelerate the engine gets really stuttery and when I parked the car, I noticed the revs were fluctuating between 900 and 1,100rpm. A few weeks ago I noticed smoke when I was pulling away a few times before the engine had really heated up. It does seem to me like glow plugs might be the issue, given I'm still on the originals.
Yesterday when I got in the car my glow plug light was on for a while before I started the car (hadn't driven it for a week) but am starting to wonder if it's running rougher because of that. I have a whole new set, but am convinced the old ones are going to snap when I take them out or I'm going to damage the harness. Given that the EGR and turbo are clean, the only breathing issue would be from the intake manifold needing a clean as well.
The advice I've heard so far about glow plugs is to get the engine warm before trying to take them out, but if anyone has had them snap, it'd be really useful to have some advice on what you did and whether you were able to sort it with the kinds of tools most DIYers would have.