Hi lads, sorry if this is in the wrong section. I have a 2007 Citroen Berlingo 1.6 HDi 75, it runs perfect when hot, no codes in Lexia, but cold start while instant, is terrible. It fires up instantly but hunts and misfires and smokes unburnt fuel until the coolant temp hits 60+ then runs like clockwork.
I notice in Lexia data logger run, that EGR swings wildly around at this point between 15% and 90% all over the place, and air flow hunts up and down around 240 to 280 as does fuel pressure. I pulled the MAF plug and instant smooth running, EGR shuts to zero and air flow reference jumps to steady 400 mg/cp. I've been told this points to the EGR being the issue, so I've got a blanking plate to fit tomorrow. Question is, will I need to remove EGR from the map, and does this all sound right to you guys or do you think it's something else?
Van is on 60k miles, fresh service, new glow plugs and relay, proven to be working and torqued to 10nm. Injector fuel correction is under 0.2 on all 4 injectors btw.