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Engine Controls - Remove/install/overhaul Mazda 929 HD

Removal & Installation 2 illustrations ~529 words

INTRODUCTION

Removal, overhaul and installation procedures are covered in this article. If component removal and installation is primarily an unbolt and bolt-on procedure, only a torque specification may be furnished.

Note. On models with anti-theft radio, obtain code number and deactivate anti-theft alarm before disconnecting battery cable.

DISTRIBUTOR

Refer to appropriate illustration when removing, overhauling or installing distributor. (Scheme 1)

Scheme 1

Scheme 1: DISTRIBUTOR
Scheme 1: DISTRIBUTOR

Removal & Installation

Crank angle sensor is located on front of engine, near crank pulley. To remove, disconnect sensor connector. Remove mounting bolt. Remove sensor. To install, reverse removal procedure. Tighten bolt to specification. See TORQUE SPECIFICATIONS .

FUEL SYSTEM

WARNINGAlways relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components.

FUEL SYSTEM PRESSURE RELEASE

  1. Start engine. Disconnect fuel pump relay or circuit opening relay. See «FUEL PUMP/CIRCUIT OPENING RELAY LOCATION»(/mazda/929/hd-1993-1995/remont/removal-installation/#engine-controls-removeinstalloverhaul) table.
  2. Allow engine to run until it stalls. Turn ignition off. Reconnect electrical connector.
ApplicationLocation
929Underhood Fuse Block

FUEL PUMP/CIRCUIT OPENING RELAY LOCATION

FUEL SYSTEM PRIMING

CAUTIONAfter performing fuel system repairs, use following procedure to prime fuel system before starting engine. This prevents excessive engine cranking and allows system to be leak-tested.

Connect jumper wire between GND and F/P terminals of data link connector. (Scheme 2) Turn ignition on for about 10 seconds and then off. Disconnect jumper wire.

Scheme 2

Scheme 2
Scheme 2

FUEL PUMP

CAUTIONAfter performing fuel system repairs, prime fuel system before starting engine. See FUEL SYSTEM PRIMING .
  1. Release fuel system pressure. See «FUEL SYSTEM PRESSURE RELEASE»(/mazda/929/hd-1993-1995/remont/removal-installation/#engine-controls-removeinstalloverhaul__fuel-system-pressure-release) .
  2. Remove rear seat mounting bolts, located between seat bottom and seat back cushions. Remove seat cushions. Remove amplifier and CD changer (if equipped) and lift luggage compartment carpeting. Remove hole cover.
  3. Disconnect fuel hoses and electrical connector. Remove fuel pump and sending unit assembly. Remove fuel pump from assembly. To install, reverse removal procedure.

FUEL PRESSURE REGULATOR

CAUTIONAfter performing fuel system repairs, prime fuel system before starting engine. See FUEL SYSTEM PRIMING .
  1. Disconnect negative battery cable. Release fuel system pressure. See «FUEL SYSTEM PRESSURE RELEASE»(/mazda/929/hd-1993-1995/remont/removal-installation/#engine-controls-removeinstalloverhaul__fuel-system-pressure-release) . Remove dynamic chamber. 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). Install dynamic chamber with NEW gasket. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/mazda/929/hd-1993-1995/remont/removal-installation/#engine-controls-removeinstalloverhaul) .

FUEL RAILS & INJECTORS

CAUTIONAfter performing fuel system repairs, prime fuel system before starting engine. See FUEL SYSTEM PRIMING .
  1. Disconnect negative battery cable. Release fuel system pressure. See «FUEL SYSTEM PRESSURE RELEASE»(/mazda/929/hd-1993-1995/remont/removal-installation/#engine-controls-removeinstalloverhaul__fuel-system-pressure-release) . Remove dynamic chamber and throttle body as an assembly. Disconnect injector electrical connectors. Disconnect vacuum and fuel hoses. 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»(/mazda/929/hd-1993-1995/remont/removal-installation/#engine-controls-removeinstalloverhaul) .

Removal

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.

Installation

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.

THROTTLE BODY

CAUTIONAfter performing fuel system repairs, prime fuel system before starting engine. See FUEL SYSTEM PRIMING .
  1. Disconnect negative battery cable. Remove air intake tubes.
  2. Disconnect accelerator cable, coolant hoses and electrical connectors from throttle body as necessary. Remove by-pass air control valve. Remove throttle body. To install, reverse removal procedure using NEW throttle body gasket. See «TORQUE SPECIFICATIONS»(/mazda/929/hd-1993-1995/remont/removal-installation/#engine-controls-removeinstalloverhaul) .

TORQUE SPECIFICATIONS

ComponentFt. Lbs (N.m)
Distributor Mounting Bolts14-18 (19-24)
Fuel Rail Mounting Bolt/Nut14-18 (19-24)
Oxygen Sensor22-36 (30-49)
Throttle Body-To-Manifold Bolts14-18 (19-24)
Upper Intake Manifold Bolt/Nut14-18 (19-24)
INCH Lbs. (N.m)
Crank Angle Sensor Mounting Bolt71-97 (8-11)
Fuel Pressure Regulator Bolts71-97 (8-11)

TORQUE SPECIFICATIONS