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Home >> Mazda >> 1985 >> RX-7 GSL, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System >> Testing >> Fuel Injector Tests >> Injector Operation
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Injector Operation

  1. Using a mechanic's stethoscope, listen to each injector for normal "clicking" operating noise at idle and under acceleration.
  2. If both injectors do not operate, ensure that there is continuity in wire between trailing coil and terminal "U" of ECU connector. If there is continuity, check main fusible link located next to left strut tower.
  3. If okay, turn ignition on and ensure that main relays (2) click each time key is turned on. Main relays are located behind left strut tower and are cylindrical in shape.
  4. If main relays do not click when key is turned on, check that battery voltage is present at main relay connector number 2 (Black/White wire). If not, repair open in circuit.
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