B2300, B3000 & B4000

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WARNING: Do not smoke or carry an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and can be ignited, resulting in possible personal injury. Fuel in the fuel system remains under high pressure even when the engine is not running. Before repairing or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved to prevent accidental spraying of fuel, causing personal injury or a fire hazard.

Remove the Shrader valve cap. See Fig 1.
Attach Fuel Pressure Gauge Special Service Tool (49-UN01 010).
Open the manual valve on SST slowly to relieve the fuel pressure. See Fig 2. This will drain some fuel out of the system. Place fuel in a suitable container.

Fig 1: Removing & Installing Shrader Valve Cap - B2300, B3000 & B4000

Courtesy of MAZDA MOTORS CORP.

Fig 2: Relieving Fuel System Pressure - B2300, B3000 & B4000

Courtesy of MAZDA MOTORS CORP.