I've had a issue with my td5 running rough like a misfire. The fuel pump sounded suspect, gurgling and screaming. So yesterday I replaced it with a brand new siemens VDO unit.
Yesterday the pump was near silent but didn't resolve the issue. Today however I've been out to start it and the pump was making a knocking sound. So I went through the purge procedure but it didn't stop. Took it for a run and it's still the same.
To touch the fuel lines you can feel a pulsing sensation in time with the pump. Any ideas?