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Smoky Exhausts Cleaning Service

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Want to avoid or reduce excessive exhaust smoke? Failed your MOT emissions test? Embarrassed by the smoke trail you leave behind you?

Our diagnosis and engine carbon cleaning is your best option!

Why does it smoke? There are many reasons why a vehicle will smoke excessively. The main ones are inefficient combustion, leaking injectors, clogged EGR valve, failing turbo, blocked DPF or catalytic converter.

We have a great wealth of knowledge and specialise in the diagnostics of excessive smoking issues or resolving MOT emissions failures. This includes live data analysis using dealer level diagnostics equipment that we include in all our carbon cleaning services. 

How do we resolve excessive exhaust smoke or high emissions causing MOT failures? Firstly we’ll use our dealer level diagnostics equipment to assess the engine management error codes and complete live data analysis. Then assuming the vehicle is fit for cleaning we use a 2-stage (for petrol naturally aspirated engines) or 3/4-stage carbon cleaning (for petrol turbo or diesel engines) that includes our world-leading Hydrogen carbon cleaning and our unique chemicals. On completion of the job, which takes approximately 45-60 minutes, we’ll reassess the engine management system and reset any fault codes.

  • Dennis O'Brien AvatarDennis O'Brien

    I highly recomend Tony, UKCC Auto Techs - Essex
    Tony did his Job really well, then proceeded to help me with a hose that had come off on my car, nothing to do with the job he was originally booked for (unblocking my DPF filter).
    He is an all round nice guy !!!

    Nigel Harris AvatarNigel Harris

    Just had a stage 3 clean on my 58 plate 520d and wow!!!!!
    Worth every penny. Great service at a price that pays for itself with the improved economy. Can't recommend this company enough. Many thanks Winston ��

  • Bruce Swan AvatarBruce Swan

    Had my Octavia Vrs done recently, I was a sceptical customer not sure about getting the clean done at first, anyway the first thing I noticed was the engine was quieter when idling. Second thing was the turbo spool was smoother and the turbo chatter had disappeared. As for performance I cant say for sure if it's more responsive or not but it definitely has less turbo lag between 4th 5th and 6th gears.

    Irfan Jaffri AvatarIrfan Jaffri

    My car driving like new, Top man and excellent service, I recommen to any one. ���

  • Peter S Kingston AvatarPeter S Kingston

    Had Adam come to my work place, & clean out the carbon on my Saab 93, which was showing limited performance on my dashboard, followed by big black clouds of smoke!

    Since the stage 3 clean i had, my cars performance has been smooth with no problems, & noticeable extra power, well recommended to anyone needing there cars done,
    Adam was an all round decent polite guy, who explained the whole process, a 5 *s and thanks from me.

    Phil Milburn AvatarPhil Milburn

    Called Yas as I had a egr fault showing. He did a full clean on my engine today. Could not do enough for me. Stayed longer than the job should have taken to make sure I got the best possible result. Friendly knowledgable guy. Went above and beyond. Would definitely use again and would highly recommend. Fault cleared and car running as sweet as a nut.

  • Mick Blacklock AvatarMick Blacklock

    great service,brilliant at what they do,highly recomend

    Kev Rutherford AvatarKev Rutherford

    Had the shogun done yesterday and what a difference!thats extra power make the car feel better to drive and hopefully bring my mpg up!thanks again James

  • Geoff Bellamy AvatarGeoff Bellamy

    Big shout to Matt at UKCC Auto Techs with his engine carbon clenaing. Transformed my Audi A4 resulting in improved throttle response, overall engine performance in general and a bonus few extra miles to the gallon. Matt took the time to explain the technology behind the process thoroughly. Recommended. As an old school automotive enthusiast UKCC Auto Techs has shown just how efficient and successful the process is.

    Alex Aroundthehouse AvatarAlex Aroundthehouse

    I have a 04 plate MK3 Mondeo 2.0 tdci.
    Every time I hit the gas to the floor, would leave a huge cloud of black smoke.
    Got today a stage 3 and after 30 min of driving it in high revs, barely any smoke.
    Thumb’s up!!!!!

Exhaust Emissions and MOT testing

In an effort to reduce pollution and Greenhouse gases most UK road going vehicles must meet set emissions standards. You can read more about these standards and MOT emissions testing here.

3-stage engine carbon cleaning
Toyota Avensis D4d excessive smoke cure and client review

Exhaust smoke colour relates to different engine issues

Too much white exhaust smoke?

White smoke is condensation caused by hot liquid vapors coming into contact with cold air as it exits the exhaust.

It’s perfectly normal for a vehicle to exhale some white smoke from a cold start, especially in cooler weather. The longer the vehicle has sat unused the more chance there is that some water vapor has accumulated in the system but this is of no concern and will quickly clear as the engine starts to warm up.

If however, the vehicle is always exhausting white smoke, even when the engine is warmed up, this will be caused by coolant entering the combustion chambers i.e. a leaking head gasket. If there are signs that the head gasket has failed switch the engine off, do not drive the car as further use will cause more damage. Have a head gasket leak test completed immediately with your local professional garage.

Too much black exhaust smoke?

If a vehicle is expelling to much black smoke it’s a sure indication that either there’s too much fuel or there is not enough air in the fuel/air mixture.

For fuel-injection vehicles, the sensors and injectors should be checked to ensure they are operating correctly and hoses related to the turbo checked for splits or leaks as either of these issues will likely cause too much fuel to be delivered and lead to a rich air/fuel mixture and black smoke.

Air filters and all other air intake components should also be checked, if clogged they will be a restriction on the air intake again leading to air in the fuel/air mixture

Too much blue exhaust smoke?

If a vehicle is exhausting blue smoke this is a bad indication that the engine is burning oil and should be inspected by a professional at the earliest convenience to determine the fault.

Most common reasons for such an issue are…

  • The engine has become worn through old age or excessive heavy driving habits leading to internal oil leaks.
  • Defective or worn piston rings are allowing oil to enter the combustion chamber. If this has occurred the vehicle will also be experiencing loss of power, especially under load.
  • An incorrect oil used during the last oil change or poor quality oil which is too thin is causing the oil to escape into the combustion chambers through the seals.

Preventative cleaning starts from as little as £89.99 (for a car)

If your vehicle has an excessive exhaust smoke issue or failed it’s MOT emissions test and therefore requires further assistance to resolve the problem there is no better alternative than a skilled UKCC technician providing our carbon cleaning service.

From just £119.99 (for a petrol non-turbo car). The advantages are:-

  • Our Mobile Carbon Cleaning Technicians come to you
  • Potentially no expensive parts
  • No disassembly is required, therefore no expensive labour
  • Completed in an average of 45-60 minutes so no requirement to leave your vehicle with a garage for days on end
  • We are fully insured to complete this service at the roadside or wherever your vehicle is located

Book a diagnostics and carbon clean service

If you require further information please visit our Carbon Cleaning FAQ’s section, contact your local technician or our HQ team on 01293 769495 to discuss your requirements, or use the inquiry form below and we’ll get back to you at your convenience.

Further questions? Make an enquiry

Click on the following links to view our other engine cleaning services – Carbon Cleaning | DPF  | EGR Valve | Oxygen Sensor | Intake Valves | Spark Plugs | Catalytic Converter | Intake Manifold | Turbocharger | Fuel Injectors

Over 5,000 satisfied UK & Ireland customers since 2016..

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Prices for Vehicle Type

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Motorbikes
£74.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£104.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£249.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
Car (Petrol)
£89.99
Hydrogen engine carbon cleaning with FREE diagnostics Book
£119.99
Hydrogen engine carbon cleaning and injector cleaning plus FREE diagnostics (recommended for non-turbo vehicles) Book
£149.99
Hydrogen, injector and chemical engine carbon cleaning plus FREE diagnostics (recommended for turbo vehicles) Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
Car (Diesel)
£89.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£119.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£149.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with no DPF or that use Ad-Blue) Book
£179.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with a DPF and do NOT use Ad-Blue) Book
£249.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure success. Book
£299.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a 1-stage Hydrogen engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£319.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£339.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Chemical, Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
LGV (Petrol)
£119.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£139.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
LGV (Diesel)
£139.99
Hydrogen and injector engine carbon cleaning plus FREE diagnostics Book
£119.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
£169.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with no DPF or that use Ad-Blue) Book
£199.99
Hydrogen, chemical and injector engine carbon cleaning plus FREE diagnostics (recommended for vehicles with a DPF and do NOT use Ad-Blue) Book
£339.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Chemical, Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£319.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Hydrogen and injector engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£299.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Then a Hydrogen engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Book
£249.99
First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning. Book
£224.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
£339.99
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book
£399
The Ghost is the original aftermarket CAN bus immobiliser. Protect your car or van from theft like nothing else on the market today. The Ghost protects your car from key-cloning, hacking, and even key theft. The Ghost has no key-fobs or LED indications to give away its location. The Ghost uses the buttons in your vehicle such as those on the steering wheel, door panels or centre console, to allow you to make a unique, changeable, disarm sequence (like a PIN code) that must first be entered before you can drive your car. Just like your credit card but you can make your car disarm sequence even safer by making it up to 20 presses long! In order to make extreme security also be hassle-free, there is a smart-phone application that connects to your car and allows you to get in and drive without having to enter the disarm sequence. NOTE: Call to check compatibility with your vehicle. Book
HGV
£199.99
Hydrogen engine carbon cleaning plus FREE diagnostics Book
POA
Custom remapping at an affordable price. Choose performance, economy or a mixture of both to suit your requirement. Book
Other Vehicle
£99.99
We'll bring our Hydrogen carbon cleaning machine to your boat. Book