General information about the carburetor system On these engines, their control system is considered as part of the emission control system. Major components include carburetors, feedback control system, air intake system, accelerator control system and EGR system....
Air filter with thermostat This is a temperature controlled device that improves warm engine performance and reduces carburetor icing. The air filter assembly is equipped with a vacuum controlled intake airflow control diaphragm and a bimetal air...
Feedback control system The system performs 4 functions: air-fuel mixture control, air emission control, air intake retardation and hot engine start control. Its components include an exhaust gas oxygen sensor, EACV and an on-board computer....
Engine Air Flow Control Valve (EACV) Health check 1. Start the engine and let it warm up to operating temperature. Disconnect the EACV hose from the air filter and, after bringing the engine speed to about 3500 rpm, feel with your hand the presence of a...
Air injection system This device is designed to provide oxygen to the exhaust gas stream. The oxygen supply is provided at a point in the exhaust pipe where the temperature is high enough to effectively burn off certain hydrocarbon...
Throttle control system This system is designed to prevent the formation of an over-rich fuel-air mixture when the throttle is closed at high engine speeds, such as during gear changes or braking. At idle, high vacuum is applied to the...
Idling speed increase regulator When the air conditioning clutch is engaged, the solenoid valve is actuated, which supplies exhaust manifold vacuum to the idle speed boost control. This device opens the throttle just enough to maintain the set idle...
Air leakage solenoid valve During normal engine operation, a small amount of air flows into the primary jets of carburetors to regulate the mixture and improve fuel atomization. At start-up, or when running at full power, the air leak valve is...
Solenoid valve for cutting off the primary mixture of idling The purpose of this valve, installed in each of the carburetors, is to shut off the flow of fuel to the idle circuit. They are open when the ignition is on and closed when decelerating or when the ignition is off. The...
Vacuum piston control system Variability in the size of the Venturi tube is achieved by moving the piston up and down inside the Venturi tube. The piston is driven under the influence of vacuum supplied from the storage chamber, which maintains...
Economizer valve At the bottom of the carburetor there is a valve, the opening of which supplies an additional amount of fuel to the main jet channel. The valve is actuated by vacuum applied through a two-way solenoid valve, which in...
Air jet regulator This device supplies a controlled amount of air to the idle and main jets of each of the carburetors. The device contains membranes that are sensitive to changes in air pressure associated with changes in altitude above...
Automatic air damper The damper is controlled by a valve that is actuated by vacuum and controlled according to the temperature of the coolant. A separate temperature sensitive valve controls the flow of coolant through the heating channels...
Fault codes All carbureted Accords since 1984 and Prelude models from 1984-1987. have control controllers with some feedback. For example, a mini-computer that controls the electromagnetic valves of the air channels, taking into...