My 75 F100 just stopped idling out of the blue. I can get it down the road but only if I pump her continuously. Carb seems okay. Getting fuel. Tried backing out adjusters, checked fuel pump, replaced filter. Getting plenty of fuel. Does the same with or without the air cleaner. Can't find any vacuum leaks. Rotor and cap seem okay. Some wear but nothing beyond what would appear normal. Like I said, out of the blue, just started doing it and now it's left me scratchin my head. Any help or suggestions would be greatly appreciated.
Thanks folks, JB

Perform the applicable tests in the link below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-11.html#post2123675

If necessary, remove the spark plugs and check each cylinder's compression (dry and wet).