Devilsix
I hope that you were able to figure out your problem(s). If not, I ran across a link from Old Cars Weekly that should be helpful to you and others in resolving this type of issue with our old trucks.
https://www.oldcarsweekly.com/restoration/pinpointing-carberator-problems The experts in this Stovebolt forum (of which I am not one), have discussed most if not all of these troubleshooting checks at one time or another. This is just a handy link that combines much of what others have posted here and it appears to be in-line with the thought process of our sages. If not, I hope they will jump in with their expertise.
It is a rather long article, but the author covers several subjects just discussed here by the previous posters along with much more.
While the title is “Pinpointing Carburation Problems”, the author also states, “
If the engine is not running right, the carburetor is the last thing that should be checked before blindly tearing into it. Ensure that compression is up to par in all of the cylinders, the valves are adjusted to their set clearances and the ignition system is operating properly. Often a faulty spark plug, wire, sticking ignition points or sticking, improperly-adjusted or leaking valves can mistakenly be diagnosed as carburetor trouble.” I believe that statement is directly in-line with what our experts here know from years of working on these old trucks.
In other words, it is never the carburetor until it is the carburetor.
Good Luck again,
Phillip
