Been suffering running issues and flat-spots for a couple of months now in my DTI. Initially i thought it might be since i blanked off the EGR a few months back, but then i realized i'd totally forgot to change the fuel filter when i serviced it 2 months ago.

Popped the new one in earlier and bled the fuel lines, and it's up and running. Took it out for a drive and the change is amazing! I never thought something like that would cause flat-spots, but hey-ho i'm happy again

Woth doing if you're experiencing the same, only £10 for a new one