Vehicle power and exhaust system Honda Civic 3 and 4

Power and exhaust system specifications
General information Fuel pressure: - models with carburetor - 0.19 - 0.26 bar - models with injection with the vacuum tube disconnected from the pressure regulator from 1985 to 1990 - 2.45 - 2.9 bar since 1991 — 2.8 -...

General information about the power supply system
The engines described in this manual are equipped with carburetors and fuel injection systems. All engines produced in 1984 are equipped with three-barrel carburetors. Since 1984, fuel injection systems have been...

Fuel system unloading (injection models)
1. Disconnect the negative cable from the battery. Open the gas tank filler neck. 2. You will need two wrenches: one to hold the banjo bolt into which the drain bolt is screwed, which must be released with the second...

Fuel pump and fuel pressure control
Models with carburetors - preliminary check 1. Disconnect the negative battery cable and remove the air cleaner housing ( see Section 7 ). 2. Check for leaks in the system. 3. If there are no visible leaks, check the...

Fuel pump — removal and installation
1. Bleed the fuel system by removing the fuel tank cap. 2. Disconnect the negative cable from the battery. 3. Disconnect the tubes from the pump. 4. Remove the protective cover and brackets attached to the pump. Fig....

Fuel tank — removal and installation
1. Remove the filler cap. 2. On fuel injected models, relieve the system from pressure ( see Section 2 ). 3. Disconnect the negative cable from the battery. 4. If there is a drain plug, unscrew it and drain the gasoline...

Fuel Tank Cleaning and Repair — General Information
Any type of tank repair must be carried out by specialists who have experience in carrying out potentially dangerous work. Do not place the tank near an open flame: explosion hazard!

Air filter housing — removal and installation
Models with carburetors 1. Disconnect the negative cable from the battery. 2. Unscrew the wing nuts from the filter cover, remove the cover, filter element ( see Chapter 1 ). 3. Label and disconnect all hoses. 4....

Throttle Control — Cable Replacement
Models with carburetor 1. Disconnect the negative cable from the battery. 2. Remove the air filter ( see Section 7 ). 3. Press the gas pedal and unscrew the lock nut to the groove on the cable housing. Fig. 8.3 To...

Carburetor — removal and installation
Removal 1. Remove the fuel tank filler cap. 2. Remove the air filter. 3. Disconnect the throttle cable from its rod ( see Section 7 ). 4. If the vehicle is equipped with an automatic transmission, disconnect the...

Carburetor diagnostics and repair — general information
Diagnostics Before starting carburetor maintenance, it is advisable to check the adjustments on the road or on a road simulator. Information on the selection of exhaust components can be found on the engine compartment...

Fuel injection system — general information
HONDA engines use two different injection systems (two- and multipoint), which work on the same principle. Air intake system. The intake system consists of an air filter, intake pipe, throttle body, idle speed control...

Fuel injection system — control
Note: The data in this Section assumes that the fuel pressure in the system is normal ( see Section 3 ). Preliminary control 1. Check the ground wire connection to the intake manifold. Check the connections of the wires...

Additional resistance of injectors (multipoint injection only) — check and replacement
Control 1. Disconnect the negative cable from the battery. 2. Additional resistors are located in the left part of the engine compartment. 3. Find the resistance connector along the wires and break the electrical...

Exhaust System Maintenance — General Information
Attention: inspection and repair of the exhaust system is carried out only on a cold engine. 1. The exhaust system consists of an exhaust manifold, a catalytic converter, a muffler, and pipelines and supporting...

Throttle body — inspection, removal and installation
Frame Control (only for multipoint injection) 1. There is a vacuum hose on top of the housing that connects the housing to the fuel vapor accumulator. Disconnect it and install a pressure gauge in its place. 2. Start...

Fuel pressure regulator — inspection and replacement
Control 1. Inspect the fuel hoses and tubes. They should be free of kinks and dents. 2. Connect the pressure gauge ( see Section 3 ). 3. Start the engine and measure the fuel pressure. Disconnect the vacuum hose from...

Fuel injectors — inspection, removal and installation
Multi-point injection system 1. Start the engine and warm it up to operating temperature. 2. With the engine idling, remove the connectors from the injectors one by one - they are in order. If the engine speed does not...

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Civic 8 (2005-2011)

Civic 7 (2000-2005)