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Home >> Mazda >> 1994 >> MX-3 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Control >> Injector Fuel Leakage
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Injector Fuel Leakage

  1. Relieve fuel system pressure. See BASIC TESTING article in the ENGINE PERFORMANCE section. Remove air valve or dynamic chamber as necessary. Remove delivery pipe with hoses still connected. Remove fuel injectors. Using wire, secure injectors tightly onto delivery pipe.
    CAUTION: Ensure injectors are securely tied to delivery pipe. If injectors are not properly secured to delivery pipe, fuel may spray from loose connections.
  2. Connect a jumper wire between terminals F/P and GND of diagnostic connector located near battery. See Fig 1 .
  3. On MPV, install a jumper wire between terminals of Yellow fuel pump check connector. Fuel pump check connector is located on firewall, under windshield wiper motor.
  4. Turn ignition on for 10 seconds. Turn ignition off, and clean injector nozzles. On 4-cylinder models, tilt injectors about 60 degrees. On all models, turn ignition on. Ensure no fuel leakage exists at injectors. After one minute, a single drop of fuel is acceptable. If fuel leakage is present, replace faulty injector.
Fig 1: Diagnostic Connector Terminal ID (MX-3, Protege & 323)
G92A24992Courtesy of MAZDA MOTORS CORP.
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