The fuel injector is a crucial part of engine operation because it’s responsible for delivering the right amount of fuel at the right time for combustion.
The fuel injector atomizes and sends fuel to the combustion chamber whenever the electronic control module operates the valve. This part also helps the engine generate maximum power while optimizing fuel consumption.
Over time, poor fuel quality, heat soak, solenoid failure, engine blow-by, and leaks can cause the fuel injector to fail, requiring you to replace it with a new one.
Fuel injector replacement can cost anywhere between $500 and $2,500, parts and labor fees included.
Changing fuel injectors isn’t exactly a beginner-friendly repair job, which is why drivers who aren’t well-versed in auto repair are advised to bring their vehicles to a certified mechanic for assistance.
Replacing an inoperable fuel injector might seem like a complicated task, but it only requires a few simple tools to accomplish.
Here are the tools your mechanic will need:
Before we get down to the nitty-gritty of fuel injector replacement, there are a few precautions to be observed to ensure that the entire process goes smoothly.
First, the mechanic will make sure to disconnect the battery and let the engine cool down completely. It’s also important to choose a clean workspace to prevent debris and other contaminants from creating problems for the exposed parts.
Always wear safety glasses and gloves before reaching for critical vehicle components. It’s a good idea to keep a fire extinguisher nearby in case of an accident while working.
Once those precautionary measures are out of the way, your mechanic will now proceed with removing the old fuel injector. Here’s an overview of what the process might involve:
Step 1: Depressurize the fuel system. Use a socket and ratchet to remove the bolts and brackets that are keeping the fuel rail in place.
In some cases, pressing on the fuel line a few times can relieve the pressure and prevent unexpected fuel spray.
Step 2: Use the appropriate sockets to remove the plastic engine covers. Then, disconnect the electrical connector from each injector using the pliers.
Step 3: Remove the fuel rail from the intake manifold. This will also bring out the injectors.
Step 4: Use a flathead screwdriver to depress the clip that’s attached to the injector. Grab the injector and move it back and forth to pull it away from the fuel rail.
Step 5: Check the injector port and clean it if necessary. Doing so will help the new injector to seal properly.
Step 6: Dip the tip of the new fuel injector in engine oil to lubricate the seal and prevent leaks. If the replacement injector came without a seal, attach a new seal instead of reusing the old one.
Step 7: Press the new fuel injector into the rail and reattach the metal clip.
Step 8: Line up all the injectors over their slots and press them into place. Then, reattach the fuel rail.
Step 9: Bolt down the fuel rail, reattach the fuel line, and plug in the electrical connections of the fuel injectors.
Step 10: Reconnect the battery.
Step 11: Turn the key to the “on” position and leave it that way for a few seconds. This will cause the fuel pump to refill the lines and fuel rail before cranking the engine.
Step 12: Wait for the engine to drop to the normal idle RPM before turning the engine off.
Step 13: Check the injectors for leaks.
New fuel injectors must be programmed or calibrated to ensure they’re in tune with the rest of the engine.
When reprogramming fuel injectors, some vehicles require a software update from the powertrain control module (PCM) or a specific coding procedure.
Remember that coding new fuel injectors can ensure a balanced fuel distribution.
Skipping the coding or programming procedure can lead to improper fuel delivery, affecting the vehicle’s fuel efficiency and overall performance.
Your vehicle will tell you when it’s time to get a new fuel injector. Watch out for these symptoms.
An illuminated check engine light can mean many things, including an inoperable or malfunctioning fuel injector.
The rubber seals in the fuel injectors can eventually crack, resulting in fuel leaks.
A sputtering engine might be a sign that the fuel injectors aren’t performing well. The imbalance in the air-fuel ratio can send vibrations through the entire vehicle.
Clogged fuel injectors can cause the vehicle to idle roughly and stall. A vehicle that’s idling roughly is characterized by varying RPMs even when there’s no foot on the gas pedal.
Fuel injectors play an important role in balancing the air-fuel ratio for the engine. Associated problems with fuel injectors can significantly reduce a vehicle’s fuel economy.
In some rare instances, an inoperable fuel injector can lead to a no-start condition. This is because the engine isn’t getting the right amount of fuel to get going.
Replacing your vehicle’s faulty fuel injectors should get rid of those pesky fuel leaks and engine misfires you’ve been noticing. But how do you know which fuel injectors to pick up? There are tons of them on the market, and not all of them will fit your vehicle. Well, the great thing is that CarParts.com has your back.
The CarParts.com catalog includes many different fuel injectors for you to choose from, but it also has our built-in vehicle selector! Simply input your vehicle’s exact year, make, and model, and our filters will show you only the fuel injectors guaranteed to fit your vehicle. We don’t mess around with that guarantee either. You can reach out to our friendly and helpful customer service team if you have concerns or questions regarding what fuel injectors you want. They’re always happy to assist and can walk you through our 60-day return policy if needed.
Don’t allow faulty fuel injectors to waste your vehicle’s precious fuel. Buy a new fuel injector from CarParts.com today.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.