Saturday, April 26, 2014
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The common engine in the Chevy Cavalier is the 2.2 liter four cylinder. A few models have a 2.4 liter engine. Both engines use two oxygen sensors. Oxygen sensors read the amount of air and burned fuels in the exhaust system and transmit that data to the engine management computer through voltage. The computer then adjusts the ratio of air and fuel to lower the pollution in exhaust. When the sensor fails in the Cavalier, the computer ignores it and makes its own adjustments, which can cause more pollution, less gas mileage or both.
Instructions
1 Locate the oxygen sensor that needs replacing. If youre replacing the front one (upstream), you can access it in the engine compartment by lifting the hood. If you are replacing the rear sensor (downstream), youll need to lift the Cavaliers front end with the floor jack and support it safely and securely onto the jack stands. The front sensor is located in the front lower center of the engine and screwed into the header pipe. The rear sensor is located in the exhaust pipe near the catalytic converter. Put on safety glasses if you crawl under the Cavalier.
2 Locate the wire harness to the oxygen sensor. Use the flathead screwdriver to press in on the clip lock of the plug on the oxygen sensor wire and separate it from the wire harness.
3 Spray a liberal amount of penetrating oil on the threads of the oxygen sensor and allow the oil to soak in.
4 Place the box end wrench or socket onto the oxygen sensor and turn it counterclockwise to unthread it from the exhaust pipe. Remove the sensor.
5 Thread the new sensor into the oxygen sensor porthole in the exhaust pipe and tighten using the wrench or socket and a ratchet. Do not overtighten. Make sure its snug, but it is easy to strip the threads on the oxygen sensor so be caul.
6 Plug the oxygen sensor wire back into the wire harness and secure the wire so it does not dangle.
7 Remove the tools and either lower the vehicle or close the hood.
Saturday, September 14, 2013
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Labels:
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The Chevrolet Cavalier is a compact car made by General Motors from 1982 to 2005. The 1993 model belongs to the second generation of Cavaliers, which includes the 1988 through 1994 models. The Chevy Cavalier had multi-point fuel injection beginning in 1992, increasing the output of the 2.2-liter engine to 110 horsepower. You must remove and install the fuel injectors in the 1993 Chevrolet Cavalier as an assembly, as none of its components are individually serviceable.
Instructions
1 Remove the fuse for the fuel pump from the fuse block under the dashboard. Start the engine and allow it to idle until it stalls. Crank the engine again to ensure the fuel system is empty. Turn the ignition off and replace the fuse for the fuel pump.
2 Disconnect the cable to the batterys negative terminal with a socket wrench. This will ensure you dont inadvertently crank the engine while installing the fuel injectors. Disconnect the air cleaner and detach the electrical connector for the fuel injector.
3 Remove the mounting screws and washers for the cover to the fuel meter with a socket wrench. Disconnect the cover for the fuel meter while leaving the gasket in place. Detach the fuel injector from the throttle body by gently prying it out with a small pry tool. Discard the large O-ring and washer from the top of the fuel injector cavity. Discard the small O-ring at the bottom of the injector cavity.
4 Lubricate the new small O-ring with transmission fluid. Install the small O-ring onto the fuel injectors nozzle, ensuring that the O-ring is flush against the fuel filter for the injector. Install the new washer into the fuel injector cavity. Lubricate the new, large O-ring. Press the large O-ring into the cavity against the washer so that the O-ring is flush with the surface of the fuel meter body.
5 Align the lug on the base of the fuel injector with the notch on the fuel meter body. Push and twist the fuel injector to install it into the cavity of the fuel meter body. Press down on the fuel injector to ensure that is completely seated within the cavity.
6 Replace the cover for the fuel meter and fasten the retaining screws with a socket wrench. Connect the electrical connector for the fuel injector and install the air cleaner. Connect the cable for the negative battery terminal.
