Quote:
Originally Posted by Macbuick
Hi,
On my 350ci is a stock Rochester 4BBL. (El Camino 1971)
How can i be sure that the 2 big barrels chokes (at the rear of the carb) really get open when i drive it ?
Must they be always open as the engine get warm ? Or ...?
The front ones works well but i can't figure how to check the big ones...
Thanks
David
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Those aren't choke plates
, and they have nothing to do with engine temperature. Those are secondary air valves. They are forced open by airflow through the secondaries when the throttle is WFO. Otherwise, they should be completely shut. You will notice a bar running between the two plates. This is attached to a set of metering rods in the secondary jets, which control fuel flow in direct proportion to airflow.