- Flat-head screwdriver
- Small Phillips-head screwdriver
- ¼ inch drive ratchet and socket set with extensions and universal joints
- Fuel line disconnect tool
- Fuel injector o-rings
- Fuel injector hold down bolts
Instructions:
Step 1: Relieve Fuel System Pressure
1. Turn the key to the ON position for 5 seconds.
2. Turn the key off and wait 10 seconds.
3. Repeat this procedure 3 times to relieve fuel system pressure.
Step 2: Locate the Fuel Injectors
1. Open the hood of the truck and locate the fuel injection system, near the top of the engine.
2. The fuel injectors are held in place by two bolts on each injector.
Step 3: Disconnect the Fuel Line
1. Use a fuel line disconnect tool to disconnect the fuel line from the fuel injector.
2. If the fuel injector does not have a quick-connect fitting, you will need to use a flare nut wrench and a pair of pliers to loosen and remove the fuel line.
Step 4: Remove the Fuel Injector Bolts
1. Use a small Phillips-head screwdriver to remove the two fuel injector bolts that hold the fuel injector in place on the engine.
Step 5: Remove the Fuel Injector
1. Pull the fuel injector straight out of the engine block.
2. Be careful not to drop the o-rings that seal the fuel injector to the engine block.
Step 6: Inspect the Fuel Injector O-rings
1. Inspect the fuel injector o-rings for damage or leaks.
2. If the o-rings are damaged, replace them with new ones.
Step 7: Install the New Fuel Injectors
1. Insert the new fuel injectors into the engine block.
2. Make sure that the o-rings are seated correctly.
3. Install the fuel injector bolts and tighten them until they are snug.
Step 8: Reconnect the Fuel Line
1. Connect the fuel line to the fuel injector.
2. If the fuel injector does not have a quick-connect fitting, use a flare nut wrench and a pair of pliers to tighten the fuel line.
Step 9: Start the Engine
1. Start the engine and check for leaks.
2. If there are any leaks, turn off the engine and recheck the fuel line connections.
That’s it! You have successfully removed and replaced the fuel injectors in your Mazda B3000.
