How much does it cost to have fuel injectors cleaned?

For most cars, a professional injector cleaning costs roughly $150 to $300 for the entire set on a typical 4- to 6-cylinder engine. Some shops charge per injector, typically $40 to $80 each. Do-it-yourself fuel system cleaners are much cheaper, usually $5 to $20 per bottle, but they don’t deliver the same level of cleaning as a professional service.

Cost options and what you get

Prices vary by service type. Here are common options you may encounter when budgeting for injector cleaning.

• Full injector cleaning for the entire set — Shops often perform ultrasonic cleaning on all injectors, test spray patterns, and reinstall them. Typical price range: $150–$300 for a standard 4- to 6-cylinder engine.


• Per-injector cleaning — Some shops bill by injector, commonly around $40–$80 per unit, which can add up for engines with more cylinders.


• At-home or in-tank fuel system cleaners — Over-the-counter cleaners and fuel additives cost roughly $5–$20 per bottle and are intended for periodic maintenance rather than a full clean; results vary and may not resolve heavy deposits.

When considering these options, keep in mind that many shops include diagnostic checks and a test drive in their price, while others bill separately for labor and testing.

What affects the price

Pricing for injector cleaning is not one-size-fits-all. The following factors can push costs higher or lower:

• Engine configuration (4-, 6-, or 8-cylinder) and whether the vehicle uses port fuel injection or direct injection, as direct injection systems can be more complex to service.


• Fuel type and quality, which can influence deposit buildup and cleaning difficulty (gasoline vs diesel; ethanol content).


• Method used for cleaning (ultrasonic immersion vs in-line cleaning) and inclusion of testing/flow-balancing checks.


• Location and shop rate structures; urban areas or dealerships typically charge more.


• Diagnostic and labor charges, warranties, and any required parts (new seals or o-rings) that may accompany the service.

Always request a written estimate that itemizes the cleaning, testing, and any diagnostic fees so you can compare options across providers.

DIY vs professional services

For budget-minded owners, a DIY approach using reliable fuel injector cleaners can reduce upfront costs, but it may require repeat treatments if deposits are heavy. Professional cleaning offers a thorough, tested service with aftercare checks, typically at a higher price—but with more predictable results and reassurance for critical engine components.

Careful budgeting and shopping around will help you balance cost with the expected improvement in engine performance and fuel economy after the service.

Summary

Fuel injector cleaning costs range from a few dollars for additives to hundreds of dollars for a full professional cleaning of a typical engine. Expect roughly $150–$300 for a complete injector set on a 4- to 6-cylinder engine, or around $40–$80 per injector if billed individually. Always obtain a clear quote that includes labor, diagnostic work, and any parts. The best option depends on your engine type, the severity of deposits, and your budget.

How do I know my fuel injectors need cleaning?

Signs that fuel injectors need cleaning include a rough idle, engine misfires, poor fuel economy, a "dancing" RPM needle, and difficulty starting the vehicle. You may also notice the check engine light is on, experience engine stalling, or detect a fuel odor around your car. 
Performance and driving signs

• Engine misfires: The engine may sputter, shake, or lurch, especially when accelerating. 
• Rough idling: Your car vibrates or shakes when you are stopped, such as at a red light. 
• Engine stalling: The engine may cut out, particularly when idling or coming to a stop. 
• Difficulty starting: The engine may be hard to start or fail to start entirely. 
• Poor acceleration: You may feel a lag or hesitation when you press the gas pedal. 
• "Dancing" RPM needle: The needle on your tachometer may move erratically up and down without reason. 

Efficiency and warning signs

• Poor fuel economy: You may notice a significant decrease in your gas mileage. 
• Check engine light: This light can come on for many reasons, but dirty injectors are a common cause. 
• Fuel odor: A fuel smell inside or around the vehicle can indicate a leaking injector. 
• Failed emissions test: An incorrect air-fuel mixture can cause your car to fail an emissions test. 

Does Walmart do fuel injector cleaning?

No, Walmart Auto Care Centers do not typically offer professional, standalone fuel injector cleaning services, though some may perform related fuel system services. They do, however, sell a wide variety of DIY fuel injector and system cleaners that you can purchase and use yourself. 

• Professional service: Walmart does not offer a professional fuel injector cleaning service as a standard service, such as the type that hooks directly into the fuel rail for a more powerful flush. 
• DIY products: Walmart sells many different brands of fuel injector cleaners in bottles that you can add to your gas tank, such as Techron, Royal Purple, and Gumout. 
• Related services: Some Walmart Auto Care Centers might offer basic fuel system services or add-ons, but it's best to call your local store to confirm if they offer any services that could help clean the injectors. 
• Professional alternatives: For a professional cleaning service, you would need to go to a dedicated auto repair shop. 

Is a fuel injection cleaning worth it?

Yes, fuel injector cleaner can be worth it, especially for preventing or addressing issues like poor fuel economy, loss of performance, and rough idling, but its effectiveness depends on the severity of the buildup and the quality of the product used. Regular use of quality cleaners can help maintain a healthy engine, though it is not a substitute for other routine maintenance like oil changes. 
This video explains why some fuel injector cleaners are more effective than others: 1mCar Care CluesYouTube · Aug 13, 2025
When it is worth it

• To restore performance: If you notice a decline in your vehicle's acceleration, horsepower, or overall performance, a fuel injector cleaner can help restore lost power by removing buildup. 
• To improve fuel economy: Cleaner injectors lead to better fuel combustion, which can result in a noticeable increase in your miles per gallon. 
• For preventative maintenance: Adding a quality cleaner periodically can prevent the buildup of deposits, helping you avoid future problems and potentially extend the life of your engine components. 
• To address symptoms: If you experience symptoms like a rough idle, stalling, or hesitation, a cleaner can help resolve the issue. 

When it might not be enough

• For heavily clogged injectors: If your injectors are severely clogged, an additive may not be sufficient, and you may need a professional, more intensive cleaning service or even injector replacement. 
• If using low-quality products: Not all fuel injector cleaners are created equal. Some products may contain cheap solvents that are ineffective or even harmful, while those with a strong cleaning agent like PEA (polyetheramine) are generally more effective. 

This video shows the effects of using a fuel injector cleaner with a strong cleaning agent: 51sChrisFixYouTube · Dec 12, 2014
Tips for best results

• Choose a quality product: Look for cleaners that are highly rated and specifically mention strong cleaning agents like PEA. 
• Follow the instructions: Always follow the directions on the product label for the best results. 
• Consider professional cleaning: For the most thorough cleaning, especially if you have a high-mileage vehicle, consider a professional fuel system cleaning service every 60,000 to 90,000 miles. 
• Don't rely on it alone: A fuel injector cleaner is just one part of overall maintenance. You should still follow your vehicle's recommended service schedule for oil changes, filter replacements, and other routine tasks. 

How much does it cost to have fuel injectors professionally cleaned?

The cost of a professional fuel injector cleaning service typically ranges from $70 to $200, depending on vehicle type. Fuel injector replacement can cost between $300 and $900 or more for parts and labor.