Got an audi 80 b2 1.6 carbed engine i believe is 8v anyway the problem is cold starts, when you start it it fires runs for a second dies does this until you start fire run theb use the accelerator as a coke almost, Rev to 2.5k then reduce revs as engine warms then its fine and it starts fine if you get it hot then restart it. Ive been told its the choke, fuel supply, thermostat, vacuum leak but im lost now tbh. Any ideas? Its a 2e2 carb with auto choke. Cheers