What causes fuel injectors to get dirty and clogged?

dirty_fuel_injectorsFuel injectors introduce fuel into the engine combustion chamber at a controlled rate. All diesel engines have injectors whilst some older petrol engines (pre 1980’s) use the alternative of a carburetor.
Injectors have tiny nozzles that under pressure allow for precise amounts of fuel to added to the air fuel

mix ratio which in turn ensures a safe and efficient combustion. Engines by vary of design have either multiple injectors (one per cylinder) or single point injection where there is one injector for all cylinders.
For fuel efficiency and emissions benefits today’s fuel injector work to extremely tight tolerances producing a finer spray that allows for better mix with the air as it enters the chambers. The production of such precise fuel delivery means these injectors are costly and don’t necessarily fail but due to the carbon deposits issue it is possible for them become restricted and clogged.

Restricted or clogged injectors reduce the flow of fuel and disrupt the spray pattern which is critical for an even combustion. Uneven spray can cause stuttering acceleration and lack of power. The most common cause of of fuel injector issues is carbon build up. When this is combined with high temperatures it leads to excessive fuel inside the injector nozzles burning. It’s a known fact that low quality fuel can worsen such problems.

How to prevent fuel injectors from getting dirty and clogged?

Primarily use high quality of fuel, they have better and more cleaning additives in them to assist keeping engine components clean including,fuel_pumps

  • Deposit control additives
  • Antioxidents and stability improver
  • Cold flow improver
  • Anti-static additives
  • Corrosive inhibitors
  • Detergents

Premium fuels contain a mixture of additives that unlike standard fuels provide the following benefits:-

  • keep injectors and other engine components clean
  • improved performance by keeping the engine running efficiently
  • keeping emissions down
  • vibration and noise reduction


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DPF Cleaning (Cars & LGV): £249.99

Discounts for carbon cleaning and DPF cleaning together from as little as £299.99

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Cleaning your Fuel Injectors?

There are numerous ways to clean or replace the Fuel Injectors with varying prices.
fuel injector

The costliest option is a complete replacement part. Most mechanics will recommend this – Why? Because they’ll earn a profit from the part and it’s a quicker job for them. The price of replacing Fuel Injectors varies considerably and will obviously depend on how many the engine has, a ball park figure is between £250 and £1,000 plus labour for fitting.
The moderately expensive alternative is to remove the injectors and manually clean them with a engine_injectorsspecialist solution, this requires some mechanical skill and time. The problem is not all valves are so easy to remove and refit, especially for the novice mechanic. As there are no replacement parts involved the cost of this service will be purely based on your mechanics labour charges so expect a charge of anywhere between £150 – £400.

CarbonCleaning Fuel Injector cleaning

image010If your vehicle requires professional intervention to unclog and clean the fuel injectors there is no better alternative.
Starting at just £89.99 (including FREE before and after OBD Diagnostic tests) our Carbon Cleaning method is the least expensive.
The advantages are:-

  • Our Mobile Carbon Cleaning Technicians come to you
  • Potentially no expensive parts
  • No disassembly is required so no expensive labour
  • Completed in just 30 minutes so no having to leave your vehicle with the professionals
  • We are fully insured to compete this service at roadside or wherever your vehicle is located

As a preventative measure against clogging of fuel injectors we recommend treatment every 15,000 miles
Thanks to the specially designed hydrogen treatment CarbonCleaning is the breakthrough alternative eliminating the need to replace expensive parts.

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Become a UK Carbon Cleaning Partner

Whether you are considering starting your own mobile carbon cleaning service or expanding your garage / workshop services we have the perfect solution for you.

Dependant on circumstances and location we also offer our unique marketing services that will as good as guarantee our quoted income potential. For further information please view the Business Opportunity page under the Trade section of our website. or contact us with any questions about how to become a UK Partner.