CAUTION
Fuel injection systems remain under pressure after the engine has been turned
OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Failure
to do so may result in fire or personal injury. Do not allow fuel spray or fuel
vapors to come in contact with a spark or open flame. Keep a dry chemical fire
extinguisher nearby. Never store fuel in an open container due to risk of fire
or explosion.
- Before servicing the vehicle, refer to the precautions in the beginning
of this section.
- Relieve the fuel system pressure.
- Remove or disconnect the following:
- Negative battery cable
- Throttle, accelerator cables and the cable bracket on Miata and Protégé
- Fuel injector wiring harness
- Fuel lines at the fuel rail
- Vacuum hose from the fuel pressure regulator
- Fuel line mounting bracket bolt
- Fuel rail mounting bolts, spacers and insulators
- Fuel rail, with the injectors attached
- Fuel injectors, grommets and O-rings from the fuel rail
- O-rings from the fuel injectors
To install:
- Install or connect the following:
- New O-rings and grommets lubricated with engine oil on the fuel injectors
- Insulators and injectors on the intake manifold
- Grommets and the fuel rail onto the injectors. Tighten the bolts to
14–18 ft. lbs. (19–25 Nm).
- Vacuum hose to the fuel pressure regulator
- Fuel lines to the fuel rail
- Fuel line bracket. Tighten the bolts to 70–95 inch lbs. (8–11
Nm).
- Fuel injector wiring harness
- Cable bracket, if removed. Tighten the bolt to 70–95 inch lbs.
(8–11 Nm).
- Throttle and accelerator cables, if removed, adjust as necessary
- Negative battery cable
- Turn the ignition switch ON to pressurize the fuel system.
- Check for leaks and correct as necessary, before starting the engine.
- Before servicing the vehicle, refer to the precautions in the beginning
of this section.
- Relieve the fuel system pressure.
- Remove or disconnect the following:
- Negative battery cable
- Charge air cooler air duct, if equipped
- Air cleaner assembly, as necessary, for clearance
- Resonator
- Left and right-hand charge air coolers, if equipped
- Accelerator cable
- Air intake pipe assembly
- Vacuum hose assembly
- Fuel injector electrical connectors
- Fuel supply/return lines and discard the copper washers
- Fuel rail
- Six insulators
- Distribution harness (accumulated connector) from the fuel rails
- Spacer from the top of each fuel injector and discard it
- Fuel injectors from the fuel rails by rotating back and forth
- Fuel pressure regulator, if necessary
To install:
- Install or connect the following:
- Fuel pressure regulator, if removed. Tighten the bolts to 61–86
inch lbs. (7–10 Nm).
- New O-rings lubricated with engine oil on the injectors
- Fuel injectors into the fuel rails
- New spacers on the injectors
- Distribution harness. Tighten the screws to 22–31 inch lbs. (2.5–3.5
Nm).
- 6 insulators and the fuel rails. Tighten the bolts to 14–18 ft.
lbs. (19–25 Nm).
- Fuel supply and return lines using new copper washers
- Fuel injector electrical connectors
- Vacuum hose assembly. Tighten the nuts to 70–95 inch lbs. (8–11
Nm).
- Air intake pipe assembly. Tighten the nuts to 70–95 inch lbs.
(8–11 Nm) and the bolts to 44–78 inch lbs. (5–9 Nm).
- Accelerator cable and adjust it. Tighten the bolt to 70–95 inch
lbs. (8–11 Nm).
- Left and right-hand charge air coolers using new O-rings. Tighten the
bolts to 14–18 ft. lbs. (19–25 Nm).
- Resonator. Tighten the nuts to 70–95 inch lbs. (8–11 Nm).
- Air cleaner assembly. Tighten the nuts to 70–95 inch lbs. (8–11
Nm).
- Charge air cooler air duct. Tighten the nuts to 70–95 inch lbs.
(8–11 Nm).
- Negative battery cable
- Turn the ignition switch ON to pressurize the fuel system.
- Check for fuel leaks and correct as necessary before starting the engine.
