My Focus was running lean. Took it to the garage they scanned the codes and came up with the problem. They had to replace a pipe at the back of the engine. The pipe was about 15mm Outside diameter and about 30mm long. As I live in a country where spares are not readily accessible they bodged it with an odd bit of pipe. I have someone coming over from UK and I can get them to bring the pipe with them. Basically I just need to know what the pipe is. If I can see one I would recognise it just need to know what to look for so a description or part number would be good.