01
Verify Fitment
Match the vehicle year, make, model, engine, and OE part number. Compare the connector, injector length, and seal positions with the original part.
Installation guides
Port Fuel Injection · PFI / MPI
Fuel Injector Installation
Follow these steps to replace a port fuel injector safely, from relieving fuel pressure to checking for leaks.
Follow these steps to replace a port fuel injector safely, from relieving fuel pressure to checking for leaks.
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Before you begin
Read first. Work safely.
- warningFire and injury riskGasoline and gasoline vapors can ignite. Work on a cool engine in a well-ventilated area. Do not smoke. Keep sparks, open flames, hot surfaces, and other ignition sources away.
- warningFuel may be under pressureFollow the pressure-relief procedure specified for your vehicle before opening the system. Wear eye protection and fuel-resistant gloves.
- importantConfirm the fuel-injection typeThis guide is only for port fuel injection (PFI/MPI). Do not use it for gasoline direct injection (GDI) or diesel systems.
- stopStop if you smell fuel or find a leakDo not start or continue running the engine if you smell fuel or find any sign of a leak. Remove all ignition sources and correct the leak before continuing.
01ConfirmMatch the injector to the correct engine
Section01
Confirm
Match the injector to the correct engine
Confirm the part and review the service manual before opening the fuel system.
Confirm the part and review the service manual before opening the fuel system.
02
Review the Service Manual
Find the correct pressure-relief procedure, removal steps, required tools, and torque specifications. Identify any seals or other parts that must be replaced.
02Prepare safelyKeep ignition sources and dirt away
Section02
Prepare safely
Keep ignition sources and dirt away
Gasoline can ignite easily. Work on a cool engine and keep dirt out of the fuel system.
Gasoline can ignite easily. Work on a cool engine and keep dirt out of the fuel system.
03
Prepare the Work Area
Work in a well-ventilated area. Do not smoke. Keep sparks, open flames, hot surfaces, and other ignition sources away. Wear eye protection and fuel-resistant gloves. Keep approved absorbent material nearby.
04
Let the Engine Cool
Wait until the engine is fully cool. Disconnect the negative battery cable only if the service manual tells you to.
03AccessRelieve pressure before disconnecting a line
Section03
Access
Relieve pressure before disconnecting a line
Assume the fuel system is pressurized until you complete the vehicle-specific pressure-relief procedure.
Assume the fuel system is pressurized until you complete the vehicle-specific pressure-relief procedure.
05
Relieve Fuel Pressure
Follow the pressure-relief procedure specified for your vehicle before opening the system. Treat every fuel line as pressurized until the procedure is complete.
06
Gain Access to the Fuel Rail
Remove covers, intake ducts, and other components in the order specified in the service manual. Label any hoses, brackets, or connectors that could be mixed up.
07
Clean Before Opening
Clean around the fuel rail and injector openings. Keep dirt, loose hardware, and cleaning debris out of the engine and fuel system.
08
Unplug the Connectors
Release each connector lock before pulling. Pull on the connector body, not the wires. Check the terminals, seals, and harness clips.
04ReplaceRemove and install the injectors
Section04
Replace
Remove and install the injectors
Protect every opening and remove every old seal before installing the new injectors.
Protect every opening and remove every old seal before installing the new injectors.
09
Disconnect the Fuel Line
Disconnect the fuel line using the procedure in the service manual. Catch any remaining fuel and cover open connections with clean, fuel-safe caps.
10
Remove the Fuel Rail
Remove the brackets and bolts in the correct order. Lift the rail evenly. Do not bend the rail or pry against plastic parts.
11
Remove the Injectors
Note the injector direction, clip position, and seal location. Make sure every old O-ring comes out. Never place a new seal over an old one.
12
Prepare New Seals
Use new O-rings or seals. Check them for cuts, twists, or dirt. Use only the lubricant listed in the service manual or injector instructions.
13
Install and Reconnect
Install each injector straight without forcing it. Reinstall the clips and fuel rail. Tighten all fasteners to the specified torque, then reconnect the fuel lines and electrical connectors.
05VerifyPressurize the system and check for leaks
Section05
Verify
Pressurize the system and check for leaks
Check every connection with the engine off. Start the engine only after confirming that there are no leaks.
Check every connection with the engine off. Start the engine only after confirming that there are no leaks.
14
Pressurize, Check, and Start
Build fuel pressure as directed in the service manual. Keep the engine off and inspect every connection. Start the engine only if no leaks are found, then check again for leaks and warning lights.
Stop if you smell fuel or find a leakDo not start or continue running the engine if you smell fuel or find any sign of a leak. Remove all ignition sources and correct the leak before continuing.