Clean all dirt and/or grease from the fuel filter fittings. "Quick Connect" fittings are used on models equipped with a pressurized fuel system. These fittings must be disconnected using the proper procedure or the fittings may be damaged. The fuel filter uses a "hairpin" clip retainer. Spread the two hairpin clip legs about 1 / 8 in. (3mm) each to disengage it from the fitting, then pull the clip outward. Use finger pressure only; do not use any tools. Push the quick connect fittings onto the filter ends. Mazda recommends that the retaining clips be replaced whenever removed. The fuel tubes used on these fuel systems are manufactured in 5 / 16 in. and 3 / 8 in. diameters. Each fuel tube takes a different size hairpin clip, so keep this in mind when purchasing new clips. A click will be heard when the hairpin clip snaps into its proper position. Pull on the lines with moderate pressure to ensure proper connection. Start the engine and check for fuel leaks. If the inertia switch (reset switch) was disconnected to relieve the fuel system pressure, cycle the ignition switch from the OFF to ON position several times to re-charge the fuel system before attempting to start the engine.
The inline reservoir type fuel filter should last the life of the vehicle under normal driving conditions. If the filter does need to be replaced, proceed as follows:
- Shut the engine off. Depressurize the fuel system.
- Raise and support the vehicle safely.
- Detach the fuel lines from both ends of the fuel filter by disengaging both push connect fittings. Install new retainer clips in each push connect fitting.
- Note which way the flow direction arrow points on the old filter.
- Remove the filter from the bracket by loosening the filter retaining clamp enough to allow the filter to pass through.
The flow direction arrow should be positioned as installed in the bracket to ensure proper flow of fuel through the replacement filter.
- Install the filter in the bracket, ensuring proper direction of flow as noted by arrow. Tighten clamp to 15-25 inch lbs.
- Install the push connect fittings at both ends of the filter.
- Lower the vehicle.
- Start the engine and check for leaks.
- Before servicing the vehicle, refer to the Precautions section.
- Properly relieve the fuel system pressure.
Remove or disconnect the following:
Install or connect the following:
Fuel filter. Torque the nut to 17 ft. lbs. (23 Nm).
- Start the vehicle, check for leaks and repair if necessary.