[fordrodsteven]

If you are getting a reading similar to the other cylinders then the engine would be mechanically functioning correctly. You know you have fuel because it will run. You are correct that a vacuum leak would cause issues on more than just one cylinder. So.... My guess would be to go back over the ignition system. I remember recently on another forum where I read about an engine not firing on #1 but otherwise okay. (Sounds like much the same issue.) I will go look at his post (at H.A.M.B. - How is this possible?) and will come back here to tell you if he found a solution and what it was.