I have had the same problem for weeks now, No EML on and got a diagnostics on it to find it said cylinder 4 injector. While the injectors where out i had all 4 refurbed with Kieth at United Diesels Very good, cost me £500 pounds. Put these back in and same problem was there, My mechanic came round with another diagnostic guy and they still said it was Cylinder 4 injector. Hmmm took it out and got it checked at United Diesels which were happy to do at no extra cost. Injector was fine. i removed the loom and checked all if the wires with a Fluke meter. No problems. Tonight we were fitting the injectors back in and 2 of the studs that tighten the injector in place snapped, Sigh so on a trip to citreon tomorrow to get new ones and see if there is a special way they need tightening. Found out this weekend there was a problem with Cylinder 4 injector not seating properly 1 year old. woulda have loved to found that out ages ago. might have to find a reseating tool as well. Will keep ya posted how it goes. P.S does the engine sound more Rattly like a old transit van ? cos Mine does and everybody said it was pointing to Injector problems. Craig C3 03 1.4HDI16v 56000 miles