Engine Controls - Remove/install/overhaul: Removal & Installation Mazda 626 GE

Removal & Installation (2.5L)

Crank angle sensor is located on front of engine near crank pulley. To remove, disconnect negative battery cable. Remove idle pulley bracket. Remove dipstick pipe. Disconnect sensor connector. Remove sensor. To install, reverse removal procedure. Tighten bolts to specification. See TORQUE SPECIFICATIONS table. Adjust ignition timing. See ADJUSTMENTS article in this section.

Removal

Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Remove fuel tank. Turn lock ring counterclockwise. Remove lock ring. Remove fuel pump and sending unit assembly.

Installation

Clean seal area on tank and assembly flange. Lightly coat NEW "O" ring with molybdenum grease. Install seal in groove. Carefully install assembly into fuel tank, ensuring filter is not damaged and seal remains in groove. Install and turn lock ring clockwise until tight. Install fuel tank.

Removal & Installation

1. Disconnect negative battery cable. Release fuel system pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-18386-S26758450182000123000000) . Disconnect vacuum and fuel hose(s) from regulator. Remove regulator mounting bolts. Remove regulator, gasket and "O" ring (if equipped).
2. To install, reverse removal procedure. Install NEW gasket and "O" ring (if equipped). Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(ref-18386-S31126021302000123000000) .

Removal & Installation (2.0L)

1. Release fuel system pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-18386-S26758450182000123000000) . Disconnect injector electrical connectors. Remove injector harness from fuel rail. Remove fuel rail mounting bolts. Remove fuel rail, injectors and pressure regulator as an assembly.
2. Remove insulators, injectors and "O" rings from fuel rail. To install, reverse removal procedure. Apply coat of engine oil to NEW "O" rings and install rings on injectors. Install NEW insulators. Tighten fuel rail mounting bolts to specification. See «TORQUE SPECIFICATIONS»(ref-18386-S31126021302000123000000) .

1. Release fuel system pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-18386-S26758450182000123000000) . Disconnect negative battery cable. Remove air intake tube. Disconnect vacuum and fuel hoses from fuel rail. Disconnect injector electrical connectors. Remove fuel rail, injectors and pressure regulator as an assembly. Remove insulators, injectors and "O" rings from fuel rail.
2. To install, reverse removal procedure. Apply coat of engine oil to NEW "O" rings and install rings on injectors. Install NEW insulators. Tighten fuel rail mounting bolts to specification. See «TORQUE SPECIFICATIONS»(ref-18386-S31126021302000123000000) .

Disconnect oxygen sensor electrical connector. Sensor may be difficult to remove when engine temperature is less than 120°F (48°C). If sensor is difficult to remove, use rust penetrant to avoid damaging threads. Carefully remove sensor.

Apply anti-seize to sensor threads (if reusing old sensor or if new sensor is not coated with anti-seize). Install sensor and tighten to specification. See TORQUE SPECIFICATIONS . Reconnect sensor electrical connector.

1. Disconnect negative battery cable. Remove air intake tubes.
2. Disconnect accelerator cable, coolant hoses and electrical connectors from throttle body as necessary. Remove throttle body. To install, reverse removal procedure using NEW throttle body gasket. See «TORQUE SPECIFICATIONS»(ref-18386-S31126021302000123000000) .