What's the purpose and function?

A functioning fuel injector helps save money in the long run by precisely controlling the amount of fuel used, ensuring efficient combustion and minimizing wastage. Keeping your fuel injectors in good condition helps maintain fuel economy, reduce emissions, and avoid potential engine problems.

A faulty injector can cause a range of issues. You might notice that your car can’t reach its maximum RPM, and cause smoke to come out of the tailpipe. You might also smell fuel in or around your car. Unfortunately, if one of your injectors is defective, it can go unnoticed until it’s too late, causing engine failure without warning signs.

Small guide on how fuel injectors operate

Fuel Delivery:  The fuel injector receives pressurized fuel from the fuel pump or fuel rail.

Intake Stroke: When the intake valve opens, fuel is sprayed by the injector into either the intake manifold or the combustion chamber, depending on the engine design.

Pulses and Timing: The engine control unit (ECU) sends electrical pulses to the injector, controlling its opening and closing. The timing of these pulses determines when and for how long the injector sprays fuel.

Atomization: The fuel injector atomizes the liquid fuel into tiny droplets, creating a fine mist. This mist improves fuel-air mixing, facilitating efficient combustion.

Combustion: When the injector sprays fuel at the right moment during the combustion cycle, it mixes with the incoming air. The fuel-air mixture is ignited by the spark plug, resulting in controlled combustion and the release of energy.

Repeat Process: The fuel injector sprays fuel to each cylinder in sync with the engine’s firing order, supplying the necessary fuel for combustion. 

Does fuel quality matter?

Using the wrong type of fuel can cause your car to be less efficient and powerful. Poor quality fuel can cause deposits to build up, leading to reduced performance and efficiency.

Use high-quality gasoline (correct fuel instructed by manufacturer) to keep your injectors in top shape. By using quality fuel, you can prevent deposit accumulation, ensuring smooth engine operation and prolonging the life of your injectors. 

Purchasing a new fuel injector vs a rebuild injector

When considering a new injector, it’s important to note that it is a brand-new component sourced directly from the manufacturer or an authorized dealer. This means it guarantees optimal performance and reliability since it hasn’t been previously used. The cost of a new injector can vary significantly, typically ranging from tens to hundreds of dollars per injector. The specific price depends on factors such as the vehicle’s make and model, the type of injector needed, and other considerations.

A rebuild involves restoring a used injector by replacing worn or faulty parts. This process is typically carried out by injector service professionals or specialized shops. During a rebuild, the injector is fully cleaned, and components like O-rings, seals, and potentially other parts are replaced as necessary. The cost of a rebuild is generally less than that of a new injector. However, the exact cost can vary depending on the extent of refurbishment needed and the associated labor costs. It’s important to consider these factors when evaluating the overall expense of a rebuild.

Ultimately, the choice between a new injector and a rebuild depends on factors such as budget, availability, manufacturer recommendations, and personal preference. It’s advisable to consult with a trusted mechanic or injector specialist to determine the best option for your specific situation.