Re: Stumbles when not warmed up
I would suggest providing more information for the experts here (not me-I know enough to be dangerous) to help out. What type of choke, how is the carb set up and adjusted, engine timing specs, vacuum advance, what carb and is it new or old, rebuilt, more details on your typical starting routine?
The choke should activate with a single pump of the accelerator and then slowly open as the car warms up. Find out if that's happening first. The fast idle and choke need to work together for best cold starts and warmups and the idle and mixture screws need to be set correctly too.
Last edited by trland; Sep 10th, 14 at 08:19 PM.