Electric fuel pumps All Accord and Prelude models covered in this book use an electric fuel pump located near or inside the fuel tank. The 1985 Accord and 1987 Prelude use an external fuel pump mounted under the vehicle in front of the...
External fuel pumps — removal and installation 1. Remove cap to release excess system pressure. 2. Pinch the fuel line going to the pump. 3. Disconnect the wire from the negative battery terminal. 4. Raise the rear of the vehicle. Remove the left rear wheel. 5. Mark...
Internal fuel pumps — removal and installation The fuel pump has a direct drive type. Fuel enters the pump through a filter, flowing near the armature through a one-way valve and then delivered to the engine compartment. It is equipped with a reflector to prevent...
External fuel pumps — check Always check the fuel filter for blockage and/or the fuel lines for kinks or blockages before testing the fuel pump. This will require a manometer and a graduated drain container. 1. Turn off the ignition. Remove the...
Internal fuel pumps — check Accord 1. Turn off the ignition. Remove the screws securing the under-dash fuse box to the bracket. Remove the fuel cut relay from the back of the fuse block and rotate the block so you can see the relay mount. 2....
Throttle Cable — Accord 1984-85 1. The throttle cable must run smoothly without binding. 2. Check the free play of the cable when connecting (the cable should be free to deviate 4.7-9.5 mm between the lock nut and the lever. 3. If the deviation is...
Damper and linkage — Accord 1984-85 1. The engine must be cold during these tests. 2. Remove the air cleaner. 3. To install the throttle, press the accelerator all the way and release it slowly. The damper must close completely. If the engine temperature...
Fast idle kicker — Accord 1984-85 1. Engine coolant temperature must be below 30°C. 2. Disconnect two hoses from the ejector. 3. To install the throttle, press the accelerator pedal to the floor and release it slowly. 4. Start the engine; it should run...
Throttle Opener — Accord 1984-85 1. This test must be performed on a cold engine. 2. Disconnect the damper heater wires. 3. To install the throttle, press the accelerator pedal to the floor and release it slowly. 4. Start the engine. The damper should...
Fast idle — Accord 1984-85 This test can be performed on a warm engine. 1. With the engine off, connect the tachometer. 2. Disconnect and plug the fast idle ejector internal vacuum hose. 3. Operate the fast idle cam by fully opening and closing...
Throttle Cover Replacement — Accord 1984-85 1. Remove the air cleaner assembly. 2. Cover the carburetor with a clean rag to prevent metal particles from getting inside. Using a 4mm drill, drill out the rivets holding the cover. Remove the fixing ring. 3. Remove...
Air-fuel mixture control — Accord 1984-85 This procedure is used to adjust the main idle speed on carbureted engines after disassembling or repairing the carburetor. In general, the mixture is adjusted at the factory and should not be adjusted without special...
Float Level Adjustment — Accord 1984-85 After leveling the car and warming up the engine to normal temperature, check the primary and secondary fuel levels through the inspection windows on the carburetor side. Several times sharply increase the engine speed...
Throttle cable — Prelude 1984-87 See figure 13 . 1. The throttle cable must run smoothly without binding. 2. Check the free play of the cable when connecting (the cable should be free to deviate 4.7-9.5 mm between the lock nut and the lever). 3. If the...
Damper and linkage — Prelude 1984-87 1. The engine must be cold during these tests. 2. Remove the air cleaner. 3. To install the throttle, press the accelerator all the way and release it slowly. The damper must close completely. If the engine temperature...
Damper Opener — Prelude 1984-87 1. When the engine is not warm, disconnect the upper hose from the throttle opener. 2. Connect the vacuum pump and pressure gauge to the line through a tee. 3. Start the engine and check the vacuum in the line. 4. If...
Startup Leak Solenoid — Prelude 1984-87 1. Disconnect the #20 vacuum hose from the vacuum manifold tubes near the emission control box. 2. Without turning on the ignition, create a vacuum in the hose. If vacuum is not achieved, replace the solenoid valve. 3....
Throttle Cover Replacement — Prelude 1984-87 1. Remove the air cleaner assembly. 2. Cover the carburetor with a clean rag to prevent metal particles from getting inside. Using a 4mm drill, drill out the rivets holding the cover. Remove the fixing ring. 3. Remove...
Air-fuel mixture control — Prelude 1984-87 Make sure the carburetors are in sync before checking idle speed and mixture condition. You will also need to remove the ECU fuse from the fuse box for 10 seconds to reset the control unit after this procedure is...
Float level — Prelude 1984-87 With the carburetor and float chambers removed, hold the assembly so that the surface of the float chamber is approximately 30°from vertical. Use a float level gauge (tool 07401-0010000 or equivalent) for measuring the...
Damper and linkage — Accord 1986-89 1. The engine must be cold during these tests. 2. Remove the air cleaner. 3. To install the throttle, press the accelerator all the way and release it slowly. The damper must close completely. If the engine temperature...
Fast idle kicker — Accord 1986-89 Cold engine 1. Disconnect two hoses from the ejector. 2. Push the accelerator pedal down to the floor and release it gently to engage the fast idle cam. 3. Start the engine; it should run at fast idle. If this is not...
Fast idle — Accord 1986-89 1. Start the engine and warm it up to normal operating temperature. 2. Turn off the engine and connect the tachometer. 3. Disconnect and plug the fast idle ejector internal vacuum hose. 4. Operate the fast idle cam by...
Air-fuel mixture control — Accord 1986-89 Vehicles with manual transmission These procedures are identical to those described in this chapter for 1984-85 Accord . Cars with automatic transmission 1. Place the vehicle in park or neutral, apply the parking brake...
Float Level Adjustment — Accord 1986-89 With the vehicle leveled on the ground and the engine at normal operating temperature, check the primary and secondary fuel level sight glasses on the side of the carburetor. Drive the engine rapidly from idle to 3000...
Removal and installation of the carburetor — Accord Withdrawal 1. Disconnect the wire from the negative battery terminal. 2. Remove the air cleaner cover. 3. Disconnect the intake and hot air hoses from the air cleaner. 4. Disconnect the vacuum lines from the air cleaner...
Removing carburetors — Prelude 1. Disconnect the intake duct and hot air hose from the air cleaner. 2. Disconnect the vacuum hose from the hot air intake control diaphragm. 3. Remove the air cleaner cover and filter element. 4. Disconnect the...
Separation of carburetors — Prelude 1. Remove the four screws and disconnect the vacuum tubes from the carburettors; remove the top manifold. 2. Disconnect the fuel shutoff and air shutoff solenoid valve connectors. Remove the vacuum hose from the...
Assembly of carburetors — Prelude 1. The damper shaft of the right carburetor has a fork at the end; insert it between the washers at the end of the left carburetor throttle shaft. 2. Install new O-rings on the evaporator tube and install it. 3. Mount...
Installation of carburetors — Prelude 1. Replace the carburetors. Make sure they are fully seated and tightened in the insulators. Install the insulator mounts. 2. Install the main fuel supply hose to the right side of the vacuum manifold. 3. Install the...
Overhaul of carburetors Warning: Carburetor cleaner is a highly corrosive liquid; Protect your eyes when handling aerosols and liquids, as well as when handling compressed air. If the cleaner comes into contact with painted surfaces, remove it...
Synchronization of carburetors Dual Prelude carburetors must function in sync, meaning that the same amount of air flows into each carburetor. Carburettors are synchronized assemblies and usually do not require adjustment for the life of the vehicle....
Internal Fuel Pumps — Accord 1990-91 Gasoline vapors are explosive. Remove components slowly to prevent falling. Do not smoke or work near open flames. Have a dry powder fire extinguisher handy. 1. Relieve fuel pressure. 2. Having disconnected all fuel...
Fuel Injectors — Accord 1985 1. Disconnect the negative cable from the battery. 2. Carefully relieve fuel pressure. 3. Remove the air cleaner housing. 4. Disconnect the electrical connector from each injector. 5. Disconnect the vacuum hose and fuel...
Fuel Injectors — Accord 1986-89, Prelude 1986-88 1. Disconnect the negative cable from the battery. 2. Carefully relieve fuel pressure. 3. Disconnect the electrical connector from each injector. 4. Disconnect the vacuum hose and fuel return hose from the pressure...
Fuel Injectors — Accord 1990-91, Prelude 1989-91 1. Relieve fuel pressure. 2. Mark the wiring harnesses from the injectors. 3. Place a cloth under the pressure regulator. Disconnect the fuel hose and fuel line. Plug the fuel line. 4. On the Prelude, disconnect the...
Throttle body — removal and installation Withdrawal 1. Disconnect the air intake pipe from the throttle body. 2. Drain the coolant to at least a level below the throttle body. 3. Disconnect the cooling hoses going to the throttle body. 4. Tag and disconnect...
Throttle Angle Sensor The sensor is located on the side of the throttle body and is connected to the throttle axis. After removing the throttle, the sensor can be removed by removing the mounting bolts. When reinstalling, make sure the...
Fuel pressure regulator Withdrawal 1. Place a cloth under the regulator. Be prepared to collect spilled fuel. 2. Relieve fuel system pressure. 3. Disconnect the vacuum hose from the regulator. 4. Disconnect the fuel line from the regulator;...
Injector resistor — removal and installation 1. Turn off the ignition. 2. The resistor is located in the engine compartment on the visor of the left wing (inner surface) or on the shock absorber. Disconnect the electrical connector going to the resistor. 3. Remove...
MAP sensor — removal and installation The MAP sensor is located inside the emission control box on the baffle. Remove the control box from the fasteners and open it. Disconnect the harness connector from the sensor, then disconnect the vacuum hose (And)....
Air intake temperature sensor The sensor is located on the intake manifold or airbox. It is removed and installed in a simple way; Disconnect the wiring connector and remove the fixing screws. Remove the sensor.
Oxygen sensor — removal and installation 1. Allow the exhaust system to cool before starting work; while the engine is running, the pipe and sensor can heat up to over 100°C. 2. Disconnect the sensor wiring connector (ov). Release the wire from any clamps. 3....
EGR system management and cleaning management EGR Related Controls (exhaust gas recirculation) and the cleaning control system are placed inside the control box on the bulkhead. These components include the EGR control solenoid valve, CVC valve and airbox if used,...
Electronic Air Control Valve (EACV), Fast Idle Valve 1. These air control valves are usually located on the side of the intake plenum. 2. Disconnect the wiring connector from the valve. 3. Tag and disconnect the vacuum hoses from the assembly. 4. Remove the mounting bolts...
Electrical load detector This sensor is only used on 1990-91 Accord models. and is located in the engine compartment relay / fuse box. Detector assembly "implanted" in the box in which it is installed, and in the event of a detector...
Fuel tank — Accord 1984-89, Prelude 1984-85 Since draining the fuel tank is part of every procedure, it is difficult to imagine that large amounts of fuel can be safely stored during repairs. Therefore, before starting work, the tank should be as empty as...
Fuel tank — Prelude 1986-91 1. Block the front wheels. Raise the rear of the vehicle and secure it securely. 2. Remove the drain bolt from the tank and drain the remaining fuel. 3. On 1986-87 models. disconnect the sensor connector. On models...
Fuel tank — Accord 1990-91 1. Block the front wheels. Raise the rear of the vehicle and secure it securely. 2. Remove the drain bolt from the tank and drain the remaining fuel. 3. Disconnect the 3-pin connector in the trunk. 4. Remove the...