Alternator gone bad?

adjust the idle up a bit, the fast idle on the choke is enough, but when warmed up the main setting is too low. should be a simple screw adjustment onto a stop on the accelerator cam. iff EFI you might have a bad idle injector or air valve. disconnect all sensors one at a time and see if any change for a few seconds-no-change, device/connection failed-reconnect- change-connection had failed -get inspected either way.