Mazda 1984 RX7 Specifications download pdf (Page 86)

1.3L ENG SECONDARY AIR CONTROL SYSTEM MODIFICATION CA

Checking Port Air Switching Valve:

1. Warm up the engine and run it at idling speed.

2. Connect a tachometer to the engine.

3. Disconnect the connector from the throttle sensor and connect a

jumper wire to A and C terminals of the connector.

Fig. 4: Jumper Wire Installation

4. Connect a voltmeter to the port air switching valve (R) terminal

and ground.

5. Increase the engine speed and observe the voltmeter reading.

Engine Speed (rpm) Voltage (V)

Idling speed - 3.000 approx. 12

3,000-4,000 below 2

more than 4.000 approx. 12

6. Disconnect the jumper wire connected in step 3 and connect the

connector to the throttle sensor.

Fig. 5: Voltmeter Connections

7. Position the vehicle on a rolling-road tester. See Fig. 6

WARNING: Use wire rope to secure the vehicle so it doesn't move

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Mazda 1984 RX7 Specifications Page 86