Hello, I know this topic is prob old but in case its not..
2002 Disco II. Was getting error on OBD for cyl 3 misfire. I changed intake gasket, coil packs, plugs, cables, injector (1). And still getting the error. I opened it all up again to make sure it was all done correct and noticed some oil in the some of the ports. Dont know it thats from when i cleaned it out or not. Any help would would be appreciated.