My old 216 has developed a backfiring problem. Keep in mind that I have no idea of the engine’s history other that it is a ’48 not the original in my ’41. When I brought the truck home I disassembled, cleaned and reassembled the carb. Removed and cleaned out the gas tank, and completely replaced the fuel lines & filter. Changed the oil & filter. Installed new plugs, readjusted the points. That was about it. The engine started and seemed to run fine for 20 or so ½ mile trips around the block.
Recently I had the distributor out for a good cleaning and now that it is reinstalled the engine has developed the backfiring problem. It starts and idles fine, but has little power and as the RPM’s come up (maybe close to 2000) the engine begins a sporadic backfire right up through the carb. It almost seems like a sticking intake valve. However I’m not quite sure, as it did not do this before I removed the distributor and the fact that the backfiring seems to get worse as I adjust the distributor through its range of advance and retard. (Worse in the retarded position)
Any ideas ??
Has anyone experienced valve sticking with an old 216
