dibarlaw, I have been watching this thread and trying to figure out what is going on here. I am having a similar problem with a 1910 model F Buick right now. Tracked it down to a sticky lifter on the front cylinder. I removed .002 from two adjoining sides of the square lifter and it cured the problem. Question is, how are the valve guides? Looseness in the guides will cause all kinds of problems too. As many of you know, I deal in NOS ignition parts for older cars. Someone mentioned a new set of points. I can't tell what distributor you now have on the car, but if you send me a picture of the points, I will send you a new set free gratus to see if that helps. my email address for the pictures is tsvanmeet@gmail.com