Installing fuel injectors into fuel rail

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Get help. Create an account. Thursday, January 13, By Staff Writer. January 24, Repair Summary. Disconnect your brake booster vacuum hose and push that out of the way as well.

Now undo each one of your fuel injectors by unplugging the fuel injector harnesses. Now you must undo the 12mm bolts that hold the fuel rail to your intake manifold. There are four total, all shown below. Make sure you have an adapter that can read fuel pressure based on the fuel in your LS1 rail. This is a crucial step in our how to install LS1 fuel injectors writeup. Depending on the year and make your LS engine was originally found, you may or may not need injector adapter clips to convert the plug to OBDI Bosch style connectors.

Loosen the bolts that secure the rail to the top of the intake manifold, or if you are performing a LS6 intake manifold upgrade this is an easy step as things are already apart. Carefully and gently lift the fuel rail up and out of your engine, by grabbing both ends and pulling gently. Make sure the injectors and rail all come up without dropping any o-rings or debris into the motor. As soon as you have your rail out, make sure to plug or cover the intake manifold so that nothing falls into your combustion chambers.

Flip your stock fuel rail over and use a flathead screwdriver to undo the metal clip that holds your fuel injector in place. This clip should come out easily and allow you to gently pull out your injector.

Once your stock injectors have been removed, inspect the orings for any damage and transfer them if your new fuel injectors did not come with orings. When seating the new injectors and your stock fuel rail back in place, try lubricating just the orings with a spray or vaseline. Make sure these oils or fluids do not touch the face or opening of your fuel injector, as you do not want to contaminate or clog them. Whatever it is you are adding is there only to assist with the dry rubber oring sliding back into the intake manifold of your LS engine.

After you have successfully installed all 8 of your injectors, you can reinstall the fuel rail with the lube instructions above. Before starting the car clean up any spilled gasoline or leftover spills on the floor.

Reconnect all your sensors and throttle cable as well as the brake booster vacuum line. Warning : If you smell gasoline vapors on top of the engine, do not wash the top of the engine off with water. The smell of gasoline vapors indicates a leak and if wash the top of the engine, water may enter the combustion chamber.

Water is a liquid and liquids are not compressible. Water in the combustion chamber will damage the piston, valves, and spark plug. Warning : Do not smoke around a vehicle if you smell fuel! You are smelling the vapors which are very flammable. Step 1: Start the engine. Check the dash for any engine light. Listen to the engine operation for the sounds of any cylinders not firing correctly. Feel for any odd vibrations during engine operation.

Step 2: Shut the engine off and open the hood. Check for any puddling of fuel around the base of the injector and intake manifold. Step 1: Park your vehicle. Make sure that the transmission is in park mode for automatics or in 1st gear for manuals. Park your vehicle on a flat, hard surface.

Step 2: Place wheel chocks around the tires that will be remaining on the ground. In this case, the wheel chocks will be around the front tires since the rear of the vehicle will be lifted up. Engage the parking brake to the lock the rear tires from moving. Step 3: Install a nine volt battery saver into your cigarette lighter. This will keep your computer live and keep your settings current in the vehicle.

If you do not have a nine volt battery saver, you can skip this step. Step 4: Disconnect the battery. Step 1: Disconnect the fuel rail from the fuel lines.

Remove the cover from the top of the engine. Using a quick disconnect tool, disconnect the fuel rail from the fuel lines. Step 2: Remove the fuel rail from the injectors. Unscrew the mounting bolts that secure the fuel rail onto the engine. Step 3: Remove the injectors from the intake ports. With using a small pry bar, lightly pry up on the injectors and pop them out of the intake ports. Clean the ports with a non-abrasive cleaner and wipe them out with a lint-free cloth. Step 4: Remove the O-ring from the injectors.

Clean the injector tips with a non-abrasive cleaner and wipe them off with a lint free cloth. Step 1: Install new O-rings onto the new injectors.

Place the injectors into the intake ports and lightly push them down into place. Step 2: Install the fuel rail onto the injectors.

Screw in the mounting bolts, all the way down to hand tight. Step 3: Snap the fuel rail and fuel line connections together. Install the engine cover and snap into place. Step 1: Reconnect the battery. Remove the nine volt battery saver. Step 2: Tighten the battery clamp. Check that the clamp is tight to ensure that the connection is good. Step 3: Turn the ignition key on. Listen for the fuel pump to activate. Turn off the Ignition after the fuel pump stops making noise. Step 4: Check for leaks.

Use a combustible gas detector and check all of the connections for any leaks. Sniff the air for any fuel odors. Step 1: Clear up your tools. Collect all tools and your creeper and place them out of the way.

Step 2: Raise the vehicle.