Thanks. I probably wouldn't have taken this job on in the first place since I don't like trying to fix other peoples screw-ups, but since I have a fondness for these little machines...well you know the rest. Anyhow, the thing has had the carburetors severely monkeyed with and has been back to the shop three times now. Naturally, I was thinking the problem was carburetor related, so have been concentrating on that issue. Trouble is, that it works beautifully while I have it...even after I spend hours driving it, the plugs are burning perfectly and the engine running strongly, but when the owner takes it home, it manages to foul the #1 and 4 plugs in a few days. Perhaps I'm grasping at straws, but meanwhile to try to eliminate the coils, I have switched them around to see if the fouling issue travels to the unaffected cylinders.
