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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 26 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)EMISSION SYSTEMS & SUB-SYSTEMSFUEL-FILLER CAP INSPECTIONLEAKAGE INSPECTION
1999 Mazda 626 ES, 2.5 D, Standard

Leakage Inspection

1999 Mazda 626 ES, 2.5 D, StandardSECTION Leakage Inspection
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Perform evaporative emission system tester self test. See EVAPORATIVE EMISSION SYSTEM TESTER SELF TEST  under EVAPORATIVE SYSTEM LEAK INSPECTION USING LEAK TESTER.

  1. Press RESET switch to set left display reading to 0.0.
  2. Connect fuel cap receiver assembly (part of SST ) to manifold assembly and fuel-filler cap from vehicle. If fuel-filler cap is not a Mazda part, replace it.
  3. Turn control valve to FILL position.
  4. Wait (maximum 20 seconds) until left display reads 13.9-14 inches of water. If reading is slightly below, adjust it using regulator knob. If reading is far below, fuel-filler cap has leak. Replace fuel-filler cap.
  5. Turn valve to EST position and press START switch.
  6. After 2-minute countdown (left display) is completed, check test result (FAILED/PASSED light on tester). If Green light turns on, fuel-filler cap is OK. If the Red light turns on, fuel-filler cap has leakage. Replace fuel-filler cap.
  7. Close gas cylinder valve.
  8. Turn control valve to FILL position.
  9. Press ON/OFF switch to turn off tester.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.