Engine Controls - Remove/install/overhaul Toyota Corolla VI

INTRODUCTION

Removal, overhaul and installation procedures (when given by manufacturer) are covered in this section. If component removal and installation is primarily an unbolt and bolt on procedure, a simple tightening specification will be suspected.

DISTRIBUTOR R & I - COROLLA 4A-FE

Note. For timing specifications and procedures, see ADJUSTMENTS in this section.

REMOVAL (COROLLA 4A-FE)

Disconnect negative battery cable. Disconnect spark plug wires from distributor cap. Disconnect distributor connection and vacuum hoses (4A-F). Remove distributor hold-down bolts. Remove distributor.

INSTALLATION (COROLLA 4A-FE)

Set No. 1 cylinder to TDC on compression stroke. Install new "O" ring into housing. Coat "O" ring with oil. Align protrusion on housing with coupling side groove. Insert distributor, aligning center of distributor flange with bolt hole on block. Install spark plug wires and set timing. Tighten hold-down bolt. Connect vacuum hoses.

Scheme 1

DISTRIBUTOR R & I - COROLLA 4A-GE

Note. For timing specifications and procedures, see ADJUSTMENTS in this section.

REMOVAL (COROLLA 4A-GE)

Disconnect negative battery cable. Disconnect spark plug wires from distributor cap. Disconnect distributor connection. Remove hold-down bolts. Remove distributor.

INSTALLATION (COROLLA 4A-GE)

Set No. 1 cylinder to TDC on compression stroke. Remove oil filler cap and look for cavity on camshaft. Install new "O" ring into housing. Coat "O" ring with oil. Align drilled mark on driven gear with groove on housing. Insert distributor, aligning center of flange with bolt hole on head. Install spark plug wires and set timing. Tighten hold-down bolt.

FUEL PUMP R & I

Note. Wait at least 20 seconds after disconnecting battery cables before starting work on fuel system.

1. Disconnect battery cables. Disconnect fuel lines. Drain fuel and remove fuel tank. Remove screws securing fuel pump and bracket assembly to fuel tank. Remove fuel pump and bracket assembly.
2. Pull lower end of fuel pump (with filter) from bracket. Remove 2 nuts securing fuel pump wires to fuel pump and disconnect wires. Disconnect fuel hose from pump. Remove rubber cushion. Use small screwdriver to remove fuel pump filter retaining clip. Remove fuel pump filter. To install, reverse removal procedure.

REMOVAL (COROLLA)

1. Disconnect negative battery cable. Disconnect PCV hoses. Disconnect fuel pressure regulator vacuum and fuel return hoses. Disconnect injector connectors. Remove fuel pressure regulator from fuel rail.
2. Disconnect cold start injector connector. Put a container or shop towel under cold start injector tube. Remove cold start injector pipe. Remove 4 vacuum hoses and EGR vacuum modulator.
3. Remove union bolt and disconnect fuel inlet pipe. Remove 2 bolts and fuel rail with injectors. Remove 2 spacers and 4 insulators from intake manifold. Remove injectors from fuel rail.

INSTALLATION (COROLLA)

1. Install new grommets and "O" rings on injectors. Install 4 injectors on fuel rails. Install 4 insulators and 2 spacers on intake manifold.
2. Install 4 injectors with fuel rail into intake manifold. Ensure injectors rotate smoothly. If injectors do not rotate smoothly, check "O" rings for proper installation. Position injector connectors upward. Install 3 fuel rail bolts. Tighten to 11 ft. lbs. (15 N.m). Connect fuel inlet pipe and tighten to 22 ft. lbs. (29 N.m).
3. To complete installation, reverse removal procedure. Tighten fuel pressure regulator bolts to 65 INCH lbs. (7.4 N.m).

OXYGEN & SUB-OXYGEN SENSORS R & I

Note. Tightening specification for oxygen and sub-oxygen sensors are not available from manufacturer.

REMOVAL

Disconnect oxygen or sub-oxygen sensor electrical connector. Remove 2 mounting nuts or bolts. Remove sensor. Some sub-oxygen sensors screw into exhaust manifold or header pipe.

INSTALLATION

Install sensor. Install nuts or bolts. Connect electrical connector. Tightening specification not available from manufacturer.

Scheme 2

REMOVAL & INSTALLATION (COROLLA)

1. Drain coolant from throttle body. Disconnect accelerator cable from throttle linkage. Remove cable bracket from throttle body (4A-FE).
2. Remove air cleaner hose. Unplug throttle position sensor. Disconnect coolant by-pass hose(s) and PCV hose. Label and disconnect emission control vacuum hoses. Remove throttle body. To install, reverse removal procedure. Tighten throttle body mounting bolts and nuts to 16 ft. lbs. (22 N.m).

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS