Sunday, November 17, 2013
How to Replace a 1995 Vortec Fuel Injector
The Vortec engine is a line of gasoline engines made by General Motors for its trucks since 1988. These engines use a technology that creates a vortex of fuel and air in the combustion chamber to improve the mixture of air and fuel. The most common Vortec engine in a 1995 vehicle is the 4300, a six-cylinder 4.3-liter engine with multi-point fuel injection. The fuel injector replacement procedure is generally the same for all Vortec engines made before 1999.
Instructions
- 1
Disconnect the cable from the negative battery terminal with a socket wrench. Open the filler cap on the fuel tank to relieve the pressure in the fuel tank. Remove the air cleaner from the intake manifold.
2Squeeze the two tabs on the fuel injectors electrical connector, and pull it straight up to disconnect the electrical wiring from the fuel injector. Disconnect the cover for the fuel meter with a socket wrench, and discard its gasket.
3Lift the fuel injector from the fuel meter with tool No. J-26868, and remove the small O-ring from the fuel injector. Remove the fuel filter from the injector by twisting the fuel filter back and forth. Remove the large O-ring and washer from the injector cavity in the fuel meter.
4Coat the new small O-rings in automatic transmission fluid, and install them to the nozzle end of the fuel injector. Place the new washer into the injector cavity of the fuel meter, so that it is flush with the top of the cavity.
5Install the new fuel injector so the lug on its base aligns with the notch in the injector cavity. Push the fuel injector down to seat it within the injector cavity, and ensure the injectors electrical terminals are parallel to the shaft of the throttle.
6Replace the gasket for the fuel meter cover, and fasten the cover with a socket wrench. Attach the electrical connector for the fuel injector. Start the engine and check for fuel leaks.
