Idle is good but does not want to ref up maybe I assembled it wrong and not sure about the jet sizes and where to put them
In general there are fewer ways to adjust the newer carbs than the vintage carbs of the past. Often the vacuum at low idle is the problem and you should check a vacuum port on the intake with a Vacuum gauge. Sometimes an EGR valve does not shut completely and the engine struggles at idle. If you find that vacuum is adequate, you can adjust the air mixture screws to provide the highest vacuum reading and then crank them in until the vacuum falls less than 1 inch. It might be beneficial to run the engine and spray a water mist from a hand powered spray bottle around the seams of the intake and carburetor. Also spray any vacuum solenoids or lines. You will notice a change in RPM if there is a leak. You may have a fuelpump problem A clogged fuel filter or low pressure can affect how the car idles. Please rate my info.
SOURCE: CARBURATOR OF NISSAN 1400 BAKKIE
the ball bearing will be a non return valve for the accelerator pump. When the pump is moved to suck in fuel from the bowl it lifts of the seat and when the pump is pressed down the force of the fuel closes it off and the fuel is squirted in to the manifold.
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