How to Replace Fuel Injectors 04-08 Dodge Ram
Difficulty: Advanced · About 75 min · Dodge Ram
Replace fuel injectors on a 2004–2008 Dodge Ram, relieving fuel pressure and removing the rail carefully before fitting injectors with intact seals and priming the system.
Tools you will need
- Socket Extensions
- Flat Blade Screwdriver
- 8mm Socket
- 10mm Socket
- Ratchet
- Cloth Rags
- Pick
Parts and supplies
- Fuel injectors
- Fuel injector O-rings
Steps
Relieve fuel pressure and disconnect the battery
Work away from ignition sources with good ventilation. Remove the fuel pump relay and run the engine until it stalls, relieve remaining pressure at the rail with a rag over the valve, then disconnect the negative battery terminal.
Remove the air intake
Release the air box clips and disconnect the PCV hose and intake tube. Remove the air box fasteners, unplug the intake sensor, and lift the assembly out for access to the fuel rail.
Remove the fuel rail and injectors
Cover the pressure port with a rag while relieving any remaining pressure. Clean debris from around the injectors, unplug each connector, release the retaining clips, and lift the fuel rail evenly to withdraw the injectors.
Install the injectors
Inspect the injector seals and replace any damaged O-rings. Lubricate the seals with an appropriate fuel-compatible lubricant, seat each injector in the rail, engage its retaining clip, then press the rail evenly into the manifold and reconnect the plugs.
Reassemble and prime the system
Reinstall the air box, intake tube, and sensor connections, then reconnect the battery and fuel pump relay. Cycle the key several times to prime the rail, start the engine, and inspect every injector for fuel leaks.
Check your vehicle’s repair manual for exact specifications and fit.