fuel delivery? Ignition?

Posted by Jeremy B On 2019/7/12 7:55:34

Issues have been driving me bonkers!

Just put my rebuilt Rochester 4GC carb back on, car runs rough at high idle.
Its starts, idles fine, can take it around town up to about 35mph, and more acceleration, it bogs down...

I'm thinking there's various solutions, was hoping the carb was the issue. I did mess with the high idle screw and regular idle screw the day the car went to crap, it ran fine for about 20 miles.

Could there be a vacuum leak? what are the usual suspect places to check?
Is it ignition? wouldn't that affect starting and idle?

It seemed that if I mess with the high idle screw, it got a little better, is there a sweet spot? As of now, the car isn't kicking down to low idle because the screws are out of whack.

Any help is very appreciated!