Specifications

AIR INJECTION SYSTEM - CARBURETEDArticle Text (p. 2)
1984 Mazda RX7For iluvmyrx7.com
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1) With engine at normal operating temperature, inspect all
hose connections for leaks. Check for pump noise and belt tension.
2) Stop engine and disconnect air line at air control valve.
Connect hose to a pressure gauge. Connect tachometer to engine.
3) Start engine and run at idle speed. Gauge should register
more than 1.64 psi (.12 kg/cm
ý
) with engine at 800 RPM. If pump
pressure is below specification, replace air pump.
CHECK VALVES
Intake Manifold Valve
Disconnect the air hose at the air control valve. Connect a
tachometer to the engine. Start the engine. Disconnect the connector
from air switching solenoid valve. Increase engine speed to 1500 RPM.
Watch for exhaust leak. If leak exists, replace check valve.
Conveter Air Line Valve
Disconnect the air hose at the rear side of the intake
manifold. Connect a tachometer to the engine. Start the engine.
Increase engine speed to 1500 RPM. Watch for exhaust leak at air pipe
opening. If leak exists, replace check valve.
AIR CONTROL VALVE
1) After ensuring air pump and all hoses are correct, check
carburetor and air control valve attaching nuts for tightness. Warm
engine to normal operating temperature. Stop engine and connect a
tachometer.
2) Disconnect air cleaner-to-air control valve hose at air
cleaner. Place a finger over the hose opening. Increase the engine
speed and make sure that air flows out when the engine speed is 1500-
2500 RPM or higher.
3) Run the engine at idling speed. Disconnect the vacuum
sensing tube (from relief solenoid valve to pipe) at the pipe. Air
should flow out from the air hose. Reconnect the vacuum sensing tube
and the air hose.
4) Disconnect the split air hose (from check valve to intake
manifold) at the intake manifold. Place a finger over the port
opening. Disconnect the vacuum sensing tube (from switching solenoid
to pipe) at the pipe.
5) Air should flow out from the port. Reconnect the vacuum
sensing tube and split air hose. If air control valve does not respond
as described, replace air control valve.
RELIEF SOLENOID VALVE
1) Disconnect vacuum sensing tubes from relief solenoid valve
and vacuum pipe. Blow through solenoid valve from vacuum sensing tube
"B" in Fig. 2. Air should pass through valve and escape from port "C".
2) Disconnect electrical connector from relief solenoid valve
and connect battery power to solenoid terminals. Blow through valve
from the vacuum sensing tube "B". Air should pass through valve and
escape through port "A" of the valve. If valve does not respond as
described, replace valve.