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Home >> Mazda >> 1980 >> RX-7 S, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Deceleration Control System >> Testing >> Richer Solenoid (Man. Trans. Only)

Richer Solenoid (Man. Trans. Only)

  1. Connect a tachometer to engine and warm engine to normal operating temperature. Disconnect coupler from solenoid and connect voltmeter to terminal of wiring harness.
  2. Start engine and increase engine speed to 3000 RPM, using throttle. Quickly release throttle lever and note speed at which current stops flowing to terminal. It should be 1050-1250 RPM. Remove voltmeter. Reconnect coupler.
  3. With engine at idle speed, disconnect coupler at richer solenoid. Engine should continue to operate smoothly. Apply battery voltage to richer solenoid connection. Engine should operate roughly or stall.