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1979 RX7

  1. Connect tachometer to engine. Start and warm engine to normal operating temperature. Detach electrical coupler from coasting valve. Attach voltmeter to terminal as shown. See Figure.
  2. Disconnect vacuum hose from dashpot diaphragm. Start engine and set speed at 3000 RPM with throttle. Quickly release throttle and check point when current stops flowing to terminal. It should be 1050-1250 RPM. Restore all connections to original location.
  3. Detach electrical coupler from coasting valve solenoid. Remove coasting valve-to-air cleaner hose from air cleaner. With engine running, hold finger over end of hose. No air suction should be felt.
  4. Apply battery power to disconnected coupler. Air suction should now be felt at hose. If coasting valve does not respond as indicated, replace it.
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