Engine Controls - Remove/install/overhaul Honda Accord IV

INTRODUCTION

Removal, overhaul and installation procedures (when given by manufacturer) 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.

Removal & Installation

Disconnect 2, 4, 6 or 8-pin connector from distributor. Disconnect spark plug wires and coil wire from distributor cap. Remove distributor hold-down bolts. Remove distributor from cylinder head. To install, coat new "O" ring with engine oil and put into place. To finish installation, reverse removal procedure. Set timing to specifications. See ADJUSTMENTS article in this section.

Note. Lugs on distributor shaft and mating grooves in camshaft end are offset to eliminate possibility of installing distributor 180 degrees out of time.

Note. Manufacturer's overhaul instructions are not available. (Scheme 1)- (Scheme 3).

Scheme 1

Scheme 2

Scheme 3

On Accord, Civic and CRX, ensure ignition switch is in OFF position. Remove distributor cap, cap seal and leak cover. Remove 2 screws to disconnect Black/Yellow and White/Blue wires from coil primary terminals. Remove 4 screws (2 screws on Accord), and slide ignition coil out of distributor housing.

Note. Prelude ignition coil is externally mounted in engine compartment. Removal and installation instructions are not necessary.

FUEL SYSTEM PRESSURE RELEASE

To relieve fuel pressure, remove fuel filler cap. Disconnect negative battery cable. Hold banjo bolt with proper wrench and slowly loosen service bolt on top of fuel filter. Place a shop towel on top of service bolt. Loosen service bolt one complete turn. Always install new washer between service and banjo bolts when loosened.

FUEL PUMP

On Accord, Civic and CRX, remove fuel tank. On Prelude, remove left maintenance access cover in luggage compartment. On all models, disconnect fuel lines and connector. Remove fuel pump mounting bolts. Remove fuel pump from fuel tank. To install, reverse removal procedure.

Removal

1. Relieve fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(/honda/accord/iv-1989-1993/remont/removal-installation/#engine-controls-removeinstalloverhaul__fuel-system-pressure-release) under FUEL SYSTEM. Disconnect electrical connectors from injectors. Disconnect vacuum and fuel return hoses from fuel pressure regulator. Place a shop towel over hoses before disconnecting them.
2. On Prelude, remove EACV from intake manifold. On all models, loosen retaining nuts on fuel rail and harness holder. Disconnect fuel rail. Remove injectors from intake manifold.

Installation

Place new "O" rings on injectors, and coat with engine oil. Assemble injectors on fuel rail, and then install assembly into intake manifold. To complete installation, reverse removal procedure.

Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Remove air intake chamber. Disconnect fuel injector harness connector. Remove screws from injector retaining plates, and remove injectors. Place a rag over throttle to prevent foreign objects from entering engine. To install, coat new "O" rings with engine oil, and place them on injectors. Install injectors in throttle body. Install new injector retaining plate. To complete installation, reverse removal procedure.

O2 sensor is mounted in exhaust pipe just below exhaust header and is equipped with a permanent pigtail which must be protected from damage when sensor is removed. Ensure sensor is free of contaminants; avoid using cleaning solvents of any type. Sensor may be difficult to remove when engine temperature is less than 120°F (49°C). Always use anti-seize compound on threads prior to installation. Tighten sensor to 33 ft. lbs. (45 N.m).

THROTTLE BODY

Note. Torque throttle body mount nuts to 16 ft. lbs (22 N.m).

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

See also:
• ADJUSTMENTS
• FUEL SYSTEM PRESSURE RELEASE