Rebuilt 318 Refuses to Start
The transition slot is where the carb transitions off the idle circuit. It should be square, or close to it. Too much exposed and you could be running rich and will cause other issues. I'd try setting your mixture screws 1.5 turns out from lightly seated. All the choke does is restrict air from entering the carb to make it run richer and aid in cold starts. It also sets your fast idle cam which maintains RPM at a higher setting while warming up. But if it all ran before, not sure if that's your problem. Would be worth looking at though. Is the MSD system a new install or previously verified good?
The transition slot is where the carb transitions off the idle circuit. It should be square, or close to it. Too much exposed and you could be running rich and will cause other issues. I'd try setting your mixture screws 1.5 turns out from lightly seated. All the choke does is restrict air from entering the carb to make it run richer and aid in cold starts. It also sets your fast idle cam which maintains RPM at a higher setting while warming up. But if it all ran before, not sure if that's your problem. Would be worth looking at though. Is the MSD system a new install or previously verified good?
