Fuel injectors deliver the precise amount of fuel into the engine’s combustion chambers for efficient performance. Over time, injectors can clog, leak, or fail electrically, leading to poor fuel economy, rough idling, or even engine misfires. Replacing faulty fuel injectors restores smooth engine operation and efficiency.

What is a fuel injector replacement?

This service involves removing faulty or clogged fuel injectors and installing new ones. The mechanic will also check the fuel rail, seals, and electrical connections to ensure proper function.

Why do you need a fuel injector replacement?

Faulty fuel injectors can disrupt the air-fuel mixture, causing rough running, higher emissions, and reduced power. If ignored, injector problems can damage the engine, catalytic converter, and other components.

Common signs you need a fuel injector replacement

• Engine misfires or rough idle
• Poor acceleration or loss of power
• Check Engine Light illuminated with misfire codes
• Fuel smell or leaks near the injectors
• Decreased fuel economy
• Excessive smoke from the exhaust

What happens during a fuel injector replacement?

A mechanic will:

1. Diagnose injector performance using scan tools and fuel pressure tests
2. Depressurise the fuel system safely
3. Remove the faulty injectors from the fuel rail
4. Install new injectors with fresh seals and O-rings
5. Reconnect wiring and fuel lines
6. Test engine performance and check for leaks

How much does a fuel injector replacement cost?

Replacing a single fuel injector typically costs $250–$500. Full set replacements range from $800–$2,000+, depending on the vehicle type and number of cylinders.

Is it unsafe to drive with bad fuel injectors?

Yes. Faulty injectors can cause stalling, misfiring, and reduced power, making driving unsafe. They can also damage other components if fuel delivery is uneven. Replacement should be done promptly.