Hello: can someone tell me what the bell looking device is on the injector pump that sits in front of the vcv in a 80 300d non turbo? thanks for the help

It adjusts fuel output based on atmospheric pressure.

Many refer to it as the ADA. There should be a an open tube on it that goes nowhere.

Thanks for the reply, the vac line on this winds up over on the valve for the climate control. Ill have to unhook this and see what happens. Thanks again