Needs throttle or choke

Sounds like it is a large vacuum leak....you're compensating for the extra air with the accelerator pump, the choke, or the carb cleaner. Check all the lines and vacuum connections... very carefully. Do you have a vaccum guage to check? If so, is the engine cammed? (It will effect the vaccum readings.) Whne it runs with the choke, is it running smoothly, and at what RPM's?