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Fuel System Pressure Release: Miata

WARNING: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
WARNING: Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes.
WARNING: Fuel in the fuel system is under high pressure also when the engine is not running.
  1. Remove the fuel-filler cap and release the pressure in the fuel tank.
  2. Disconnect the fuel pump relay (FP RLY) harness connector (6-pin type connector: 4 terminal) located above the accelerator pedal. See Fig 1.
  3. Start the engine.
  4. After the engine stalls, crank the engine several times.
  5. Turn the ignition switch to the LOCK position.
  6. Connect the FP RLY harness connector.
Fig 1: Locating Fuel Pump Relay - Miata
G00256245Courtesy of MAZDA MOTORS CORP.