How do you adjust the choke on a 2 barrel carburetor?
To adjust the choke, loosen the screws on the choke spring housing and rotate it until the choke is all the way closed. Adjust the choke if it closes all the way when the engine is cold, but does not open all the way after the engine is started and warmed up.
Which is the first step in choke adjustment?
Diagnostics The first step in any choke adjustment procedure is to locate the proper specifications for your car from a factory shop manual. Most earlier pull-off specifications were keyed to a drill bit size, while later Rochester carburetors used a more exact choke angle gauge, as seen in this primer.
What should I do if my choke does not work?
If the engine does not start when cranked over for a few seconds, release the key and press the accelerator to the floor one more time to evoke an additional accelerator pump shot. Most automatic chokes have a “clear flood” mode or “unloader” that is carburetor-linkage operated.
Is the choke spring part of the carburetor?
Spring: The choke spring can be either integral (a part of the carburetor), such as the design used on the later Rochester Quadrajet, or divorced (not attached to the carburetor), which was common on Chrysler products. When divorced, a linkage connects the spring to the choke plate.
Diagnostics The first step in any choke adjustment procedure is to locate the proper specifications for your car from a factory shop manual. Most earlier pull-off specifications were keyed to a drill bit size, while later Rochester carburetors used a more exact choke angle gauge, as seen in this primer.
If the engine does not start when cranked over for a few seconds, release the key and press the accelerator to the floor one more time to evoke an additional accelerator pump shot. Most automatic chokes have a “clear flood” mode or “unloader” that is carburetor-linkage operated.
Spring: The choke spring can be either integral (a part of the carburetor), such as the design used on the later Rochester Quadrajet, or divorced (not attached to the carburetor), which was common on Chrysler products. When divorced, a linkage connects the spring to the choke plate.
Why does my car stall when I close the choke plate?
Starts and stalls within a few seconds: If the choke plate closes properly and the engine starts and stalls almost immediately, the issue is usually not choke-related. This condition is likely the result of the carburetor float bowl losing fuel when the engine is turned off.