basic choke question

[t-west]

When engaged, the choke makes the carb rich, right?

--tom

 

[addo]

Yes.

By obstructing some of the airflow, the air proportion is reduced in comparison to the fuel remaining similar in amount. Many choke mechanisms have an override whereby a large amount of air passing through the carb, draws the choke flap open against spring pressure. Drop down to idle speed and the choke is effective again.

 

[t-west]

Thanks addo,

my car runs really rough when choked, and smooths out once I "blip" the throttle. I'm wondering if I'm a bit rich to begin with, though the plugs don't suggest it . . .

I'll look into it next weekend, and thanks again.