Model J regulator, CA100 mixer.

The bulkhead fitting has less than 25 hrs on it and the filter appears to be as new.
Perhaps it's impossible to visually tell if the felt filter is clogged?

Liquid fuel out of the end of the hose fitting just before the regulator (where it goes INTO the fuel solenoid). Also liquid fuel out of the solenoid valve when energized. And for several seconds, not just a split second. I wanted to be certain there was plenty of free flowing fuel available up to the regulator.
It blasts out the end of the hose.

No VFF-30....there is a vacuum switch in the circuit with the fuel solenoid.....which is bypassed for testing.

I am positive it goes lean now because I had my hand almost completely over the air intake and it ran fairly well till it got so lean it died. It seems to run 30 seconds or so the lean out and stall. It actually sat there at high idle and then quit more than once.

Also tested with carb cleaner and it runs OK and steady on that, as long as I'm spraying it in the carb in a steady stream.

Weird....

I can check the ignition also, but it really seems like fuel delivery problems.

Any way to test the regulator??

I will try a different tank too!

Thanks
dk