sindersblue

Hey all. I'm having some problems with the choke (I think) and a stumbling that almost feels like a miss at middle RPMS while cruising or throtle is held steady. The latter situation comes and goes making me think it might be electrical.
When starting cold, it takes about 30 seconds of cranking to get it started. It does "high idle" once it does start. The truck idles and runs fine other than this. I rebuilt the carb 3 years and 70k ago with a NAPA rebuild kit and have had no problems at all since. New plugs, cap, rotor, wires, fuel and air filter all within the last year. All the vacume lines and electrical wires and plugs look fine. This all came about when I let it sit for about 3 weeks.

Any ideas?

Thanks, Dan