I have a 86 IROC, that has been swapped with a 350 carb motor. I know the engine has a mild cam, weiand intake, 650 edelbrock carb. I know im running a rich, not horrible but you can tell its rich.

Now my problems, if the cars cold, i can get it to fire up no problem with one turn of the key, but if the engine is even remotely warm it takes a couple cranks and me throttling it to fire, and even after firing sometimes it will die and ill have to do it again. Any ideas?

Also when i first start driving it after firing it up when its cold, it will bog down on me, if i try giving the throttle a good push, I dont mean to the floor or even half way to the floor, just a like quarter throttle. I haven't killed it by doing it but you can feel it bog and it sounds like im back firing. Once the car is warmed up it has no problems. Any Ideas?

 

What distributor are you using?

Is the choke hooked up and functioning?