Specifications

AIR INJECTION SYSTEM - CARBURETEDArticle Text (p. 3)
1984 Mazda RX7For iluvmyrx7.com
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Fig. 2: Testing Relief Solenoid Valve
RELIEF SOLENOID VALVE SIGNAL CHECK
1) Warm engine to normal operating temperature. Connect
tachometer to engine. Disconnect connector from throttle sensor and
connect a jumper wire between terminals "A" and "C" of connector. See
Fig. 3.
2) Disconnect the vacuum sensing tube (from relief
solenoid valve to pipe) at the pipe. Place a finger over the vacuum
sensing tube opening. Start engine. Air should be sucked into the
tube.
3) Increase engine speed. Air should not be sucked into the
tube when engine speed is 3600-4400 RPM or higher. Disconnect the
connector from the catalyst thermosensor. Gradually increase the
engine speed and make sure that air is not sucked into the tube when
the engine speed is 1000-2000 RPM or higher.
4) Reconnect the connector to the catalyst thermosensor.
Disconnect the jumper wire and connect the connector to the throttle
sensor. Disconnect the sensor from the heat hazard sensor and connect
a jumper wire to both terminals of the connector. Make sure that air
is not sucked into the tube at any engine speed.
5) Disconnect the jumper wire and connect the connector to
the heat hazard sensor. Stop the engine and disconnect the connector
from the number 2 water temperature switch on the radiator. Disconnect
the connector from the number 1 water temperature switch.
6) Connect a jumper wire to both terminals of the connector.
Pull the choke knob out about .6" (15 mm). Start the engine. Gradually
increase the engine speed and make sure that air is not sucked into
the tube when the engine speed is 1000-2000 RPM or more.
7) Connect the vacuum sensing tube to the pipe. Stop the
engine and connect the jumper wire. Connect connector to the number 1
water temperature switch.
Fig. 3: Testing Relief Solenoid Valve Signal
SWITCHING SOLENOID VALVE
1) Disconnect vacuum sensing tubes from switching solenoid