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DPF’s have been fitted to comply with European emissions regulations and it is illegal to alter or remove the system. In a press release from 2 May 2016, FOE air pollution campaigner, Oliver Hayes, stated, “Air pollution is a public health crisis of breath-taking proportions. The dodgy practice of removing pollution filters from cars is not only risking people’s health but also putting drivers at risk of prosecution for the simple fact that it’s illegal to drive a car with its DPF removed.” You may get a strange smell coming from the engine bay or underneath of the car. Common smells are a foul, eggy like smell and you also get a burning smell which can be alarming to say the least! After lots messing around with a new aftermarket DPF (Which turned out to be faulty!) and new DPF sensors I bought this product to clean out my original DPF. It's very easy to use by sealing off one end and leaving it for up to 8 hours. The EGR valve (Exhaust Gas Recirculation Valve), sits in the engine bay and exhaust gasses flow through it before moving on through the DPF filter. Because diesel fuel is quite oily in it’s formulation, diesel cars often suffer from carbon build up in the engine. An EGR valve is a prime candidate for coking up with carbon and often results in reduced gas flow through the valve. Again, a common cause for EGR valve problems is frequent short journeys around town as opposed to motorway journeys.
Put the numbers to one side and notice that hundreds of car repair garages continue to offer the removal of DPF filters. MP’s are labelling this practice as ‘detrimental to people’s health’ and ‘unacceptable’. Here, I provide a two-step guide to regenerating a DPF filer for pennies, without the need for a mechanic My Zafira was in excellent condition and may have been previously owned by a very careful driver that rarely revved the engine. The warning light is there to serve as an alert that the system requires attention. It’s really important to take action as soon as the light illuminates, failure to do so can result in an expensive repair bill. Motorists tend to avoid repair due to the expense of cleaning, remapping or replacing the filter, particularly if the car still runs pretty well but there is an engine warning or glow plug light flashing.
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In this review, we look at the best DPF (Diesel Particulate Filter) cleaners on the market for your diesel vehicle and explain why they are so important. DPF filters are fitted as standard on all modern diesel vehicles and can cause extreme problems if not maintained properly, so therefore it’s really important to understand how they work and how best to avoid problems with some simple preventative maintenance. Diesel particulate filters (DPF) are placed on the exhausts of diesel vehicles to prevent toxic emissions from flowing into the environment. Despite this, some motorists have the diesel filter removed to avoid mechanic failures and additional maintenance costs. Update – October 2023– We have updated our product recommendations in line with some excellent new products that have been released in the UK market. Since 2014, any diesel vehicle missing a diesel particulate filter will automatically fail its MOT. The Guardian newspaper revealed that thousands of drivers have been caught without a DPF fitted to their vehicles.
Generally, DPF cleaners begin to work pretty much straight away after being application. Research has shown that vehicles can start to show improved performance as little after 10-15 minutes after the DPF cleaner has been applied. Once you’ve applied the cleaner, you should start to see a noticeable improvement from your car. How Often Should I Use DPF Cleaner?
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No, you cannot have your DPF removed. It’s a legal requirement in the UK and if removed, your car will immediately fail an MOT test. You may notice a rough and different idle to your car engine. It may be jerky and unsteady when stationery, due to the gasses not flowing properly through the DPF filter. If the DPF filter reaches a certain percentage full level, your car will give you a warning light which will look something similar to the image below (The image will vary between car manufacturer but will generally look very similar)
This will depend on the types of journey you do. If you drive on a motorway regularly for extended periods of time, you’ll need to use DPF cleaner less often than a typical “around town” driver. A DPF system works sitting in between the vehicle engine and exhaust system. It’s a small to medium sized filter which catches exhaust soot and then stores it in the filter instead of it being pumped out of the exhaust and into the atmosphere. If your car is suffering with a fuelling, or EGR valve system problem, it can prevent a DPF regeneration from taking place. Founded in 1971, FoE is a federation of 74 groups from all over the world who are dedicated to saving the environment. One of their primary causes involves complaining to the ASA about the prevalence of adverts for DPF removal services. DPF filters are fitted to all modern diesel vehicles and were introduced around 2009 to comply with Euro 5 exhaust emissions rules, some vehicles were fitted with them slightly prior to this. Only Got 5 Minutes?
Why remove DPF’s?
In 2016 I bought a Vauxhall Zafira diesel automatic, with a DPF filter fitted as standard. As I was driving the car from Southampton to Bristol the engine glow plug light began flashing. Different cars will illuminate different warning lights as you can see in the image below. A close runner up, Cataclean 6160 DPF cleaner offers exceptional performance at a really impressive price point. Cataclean claim it’ll reduce emissions but as much as 60%, a really impressive bit of kit. As well as protecting and cleaning the DPF, it’ll also protect and maintain catalytic converter systems. The key features of Cataclean 6160 DPF cleaner are;
Modern diesel vehicles require regular journeys and not just that, they require journeys which allow the engine to get up to optimum temperature which then allows all of the emissions systems to work at their best. Unfortunately, short, infrequent journeys are a huge problem for modern diesels which are equipped with DPF filters as they don’t allow the DPF and other emissions systems to work properly. The Coronavirus pandemic has resulted in most people working from home which has then culminated in their vehicles not being used anywhere near as much. When drivers are using their cars, they are generally being used for a weekly trip to the shops, school run etc. Once the exhaust has reached the specific temperature, the vehicle will begin the regeneration process which consists of the soot inside the filter canister being burnt off to create more space inside the filter. DPF cleaners are suitable for most diesel or biodiesel engines and they may require regular usage to keep the DPF clean. However, if you find that they aren’t as effective as you would expect, go on a “spirited” drive whilst keeping the RPM’s high. You could also drive on the motorway and keep the car in a lower gear whilst travelling at 60 to 70 MPH. This type of driving along with using the cleaner should help to keep it clean as long as there isn’t a fault with the DPF. The cost of using a dedicated DPF cleaner regularly is far cheaper than the cost of a DPF repair or replacement, it’s a great preventative measure which is now an essential part of maintaining our vehicles. You need to make sure you choose the best DPF Cleaner you can afford to get the best results possible. How Long Does The DPF Cleaner Take To Work?Once you have run the car very hot for a sustained period pull over and immediately switch off the car. Prior to the conception of DPF filters, those harmful exhaust gasses were being pumped straight out into the atmosphere. Using a DPF cleaning additive as a preventative measure could potentially save you thousands in repair bills. FREE UK delivery applies to Zone A, UK Mainland England, Wales and Southern Scotland (Central Belt of Scotland) and Excludes surcharge post codes and areas.
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