hard cold start

Plese help!! My 79 Buick with CHEV 305, V-8 just passed smog test, carb was rebuilt, engine tuned etc.. now in the morning it cranks strong but will not start.If I wait about 4 minutes then it starts.What could this be ? Also, after I tap pedal to bring down idle it seems to go back uo by itself!! Someone please e-mail me @ [email protected].
Thanks!!!!

my experiance with carb'ed cars are all the same way, on a cold morning i pump one 3 times the crank it and it will start but i have to keep my foot on the pedal til she takes gas on her own.

Plese help!! My 79 Buick with CHEV 305, V-8 just passed smog test, carb was rebuilt, engine tuned etc.. now in the morning it cranks strong but will not start.If I wait about 4 minutes then it starts.What could this be ? Also, after I tap pedal to bring down idle it seems to go back uo by itself!! Someone please e-mail me @ [email protected].
Thanks!!!!It sounds like your choke might be stickin. If it keeps doin it open the hood and see if the chock is all the way open after it warms up,or u could have a vaccum leak.