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How to Install the Fuel Injectors for a Gen III Engine

The LS series of engines are manufactured by General Motors for use in its rear-wheel drive vehicles. The third generation of these engines, also known as Gen III engines, were in production from 1997 through 2007. They appear in many different vehicles from General Motors, such as the Chevrolet Camaro produced from 1998 through 2002. The Gen III engine uses electronic fuel injectors to deliver fuel to the engine under high pressure.

Instructions

1

Remove the cable from the negative battery terminal with a socket wrench so you dont accidentally start the engine. Open the filler cap on the fuel tank to relieve the pressure in the fuel tank.

2

Wrap a shop rag around the pressure valve on the fuel rail and attach a fuel pressure gauge to the valve. Put the bleed hose of the fuel pressure gauge into a gasoline container and open the valve to relieve the pressure in the fuel system.

3

Disconnect the fuel line from the fuel rail. Remove the accelerator cable and its bracket from the engine compartment with a socket wrench. Detach the electrical connectors from the fuel injectors and fuel rail.

4

Remove the fuel rail and fuel injectors from the intake manifold as an assembly with a socket wrench. Spread the retainer clips for the fuel injectors apart and remove the fuel injectors from the fuel rail. Discard the retainer clips and O-rings on the fuel injectors.

5

Coat the O-rings for the fuel injectors with engine oil and mount them to the fuel injectors. Install the new fuel injectors onto the fuel rail with the electrical terminals on the injectors facing outward. Attach new retaining clips to the fuel injectors.

6

Connect the fuel rail assembly to the intake manifold and tighten its mounting bolts to 89 inch-pounds with a torque wrench. Attach the electrical connectors for the fuel rail and fuel injectors. Install the accelerator cable and its bracket with the socket wrench. Attach the fuel lines to the fuel rail and tighten the fittings.

7

Reattach the cable to the negative battery terminal with the socket wrench and fasten the filler cap onto the fuel tank. Turn the ignition on for two seconds to pressurize the fuel system then turn it off for 10 seconds. Turn the ignition back on and check for any fuel leaks.

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