Cold Start - Stalling

Hey Folks I'm hoping someone can help. I have a 1.3 driver running a Weber 32/34 DMTL carb. The car starts fine on the choke however once started (and choke back in) I have to keep the revs on the car until it's up to temperature otherwise it will cut out. Once up to temp it idles fine. Any suggestions as what to look for or check?