Mazda 1983 RX7 - No.2 Anti-Afterburn Valve; Testing No. 1 Anti-Afterburn Valve; Throttle Sensor

DECELERATION CONTROL SYSTEM
Article Text (p. 2)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 04:58PM
Fig. 1: Testing No. 1 Anti-Afterburn Valve
NO. 2 ANTI-AFTERBURN VALVE
1) Warm engine to normal operating temperature. Disconnect
No. 2 anti-afterburn valve-to-air cleaner hose at air cleaner. Place
finger over hose and ensure air is not drawn into hose.
2) Disconnect vacuum sensing hose from No. 2 anti-afterburn
valve. Air should not be drawn into hose. Connect vacuum sensing hose
to valve; air should be drawn into anti-afterburn valve-to-air
cleaner hose for 3 seconds.
3) If air is drawn for more than 3 seconds or no air is
drawn, replace No. 2 anti-afterburn valve.
THROTTLE SENSOR
1) Warm engine to normal operating temperature. Stop engine.
Connect tachometer to engine. Disconnect throttle sensor electrical
connector, located on right side of engine (Black/Yellow and
Green/Black wires).
2) Using 2 voltmeters, connect positive lead of one
voltmeter to Light Green/Yellow wire terminal of throttle sensor
check connector.
3) Connect positive lead of other voltmeter to Green/Yellow
wire terminal of throttle sensor connector. Connect negative
terminals of voltmeters to good ground. See Fig. 2.