Hi Mike

Had something similar a while back, misfire but all seemed to check out, I also measured the injector resistance and all ok, I scoped the injection duration and they were all getting a signal, but when I scoped them with a current clamp you could clearly see one dropping out causing a misfire, think that would be my next move

http://members5.boardhost.com/ukautotalk4/msg/1200316589.html

HTH

Peter