How To Clean A Ml 350 Dpf Filter

TheDiesel Particulate Filter (DPF)is best described as the "ticking fourth dimension bomb" in nearly modern diesels. Like to EGR issues, the DPF tin become clogged up from city driving where the car does not get up to temperature.

The whole reason the Diesel Particulate Filter came along was to clean up the diesel car image (Euro 5 Emissions, 2009). Emissions from diesel fuel cars are a big concern worldwide and thanks to the DPF engineering, diesel cars are much cleaner.

DPF'due south are great for the environment so forth, however they are a right pain when they get wrong. DPF regeneration, repairs and new replacements are seriously expensive and tin can atomic number 82 to some vehicles becoming scrapped.

Table of Contents

How does a DPF Piece of work in Diesel Cars?
- Active DPF Regeneration
- Passive DPF Regeneration
- Forced DPF Regeneration
What causes DPF failure?
Symptoms of a Block DPF Filter
How to Articulate a Blocked DPF and Keep it Clean
Remove the DPF from the Exhaust System
Have Y'all Bought The Wrong Automobile?

How does a DPF Piece of work in Diesel Cars?

The Diesel Particulate Filter traps the harmful diesel gases that gets cleaned regularly by a process calledDPF regeneration. The nerveless diesel soot particles are burnt off at high temperatures, which results in an "ash-like" afterward product. After the regenerating of the DPF, it can at present restart the cycle of collecting harmful exhaust gases over again.

There are 3 different types of DPF regeneration, which are active, passive and forced.

Agile DPF Regeneration

Agile reads the back pressure of the exhaust or soot load of the filter to determine when to begin the regeneration. Once initiated, the timing of the fuel injection volition alter that will result in the exhaust temperature increasing to burn down the soot particles.

During an active DPF regeneration, you may notice the following:

Higher idle RPM/Speed
Cooling fan working harder
Poor fuel economic system
Smells from exhaust
Engine annotation modify

Passive DPF Regeneration

Passive will take identify once the exhaust reaches optimum temperatures where the regeneration will automatically begin. The exhaust volition reach these temperatures will occur mostly on prolonged highway driving. Manufacturers that use a passive form of regeneration typically install a oxidizing catalytic converter near the engine to increment the temperature.

Forced DPF Regeneration

Forced is where the Active regeneration could not occur that has resulted in the soot levels reaching 70% and to a higher place. The diesel machine will enter limp manner and will require a car diagnostic tool to force the regeneration. Its important that this is done as before long as possible considering in one case the auto reaches 85% soot level, the DPF will need to be removed and cleaned.

What causes DPF failure?

Sadly DPF'due south do neglect and many diesel auto owners do not realize how they are causing a blocked DPF. The principal reason for DPF's declining is due to motorcar owners not doing plenty miles and driving too frequently in metropolis areas.

How long until a DPF will fail is hard to tell because some manufacturers have had to replace some in the first three years and some never. The most common reasons for DPF failures are:

Brusk journeys where the engine doesn't reach optimum operating temperature
Clogged EGR Valve increasing diesel soot passed to the DPF
Faulty fuel injectors sending too much fuel to the air/fuel mixture
Wrong engine oil upon servicing the machine – (Depression Ash + Depression Sulphur required for DPF Cars)
Turbo declining with oil dripping into the DPF
High mileage auto that will detect regeneration harder

increase fuel in your tank when filling up

Symptoms of a Block DPF Filter

As the bulk of DPF's are installed on newer cars, you will more than than likely take a trip computer. Error codes such as the DPF calorie-free or EML (Engine Management Light) will be the first symptoms of a failing DPF.

Nevertheless, sometimes these warning lights can be fake alarms and you should try clearing the fault using an OBD2 diagnostic tool. If the alert calorie-free go along to display, you will notice the following symptoms:

Loss of ability
Reduced fuel economy
Poor throttle response
Harder or failure to get-go
Limp mode (most likely)
Bad smells

How to Clear a Blocked DPF and Keep it Clean

The cost of cleaning or replacing your DPF sounds scary but you tin forget this following some unproblematic driving habits. The master reason DPF's get blocked is due to short trips and town driving. With that in heed, hither are 5 means to fix a blocked DPF:

Bulldoze Faster. If yous are driving slowly everywhere in your large diesel fuel, the DPF volition go blocked. Increase your speed and constitute your foot to flooring to when accelerating to increase exhaust temperature and clear soot levels.
Increase Your RPM. If the DPF light is on, your best bet is to drive at high RPM's for a prolonged period until the warning lights turn off. This will increase the gases going through the DPF, thus clearing information technology and increasing the temperature.
Avert City Centers. If possible, you should avoid irksome traffic where possible, especially if you are nearing your DPF limit or take the light currently on.
Check EGR Valve. If you have problems with your EGR valve, it volition be even harder to clear the DPF. Prepare the EGR issue so effort the other steps.
Apply High Quality Fuel. Premium fuels or diesel fuel cleaners include fuel additives that assistance burn off harmful particles.

If you lot are currently in limp home mode, driving at high RPM (step two) will be your best run a risk of getting out of limp style. Once you have normal power, get for a long fast drive on high quality fuel. If the issue remains the adjacent day, become your mistake codes read by a diagnostic tool.

For those that live in city areas or get stuck in traffic on a regular footing, it's hard to keep the DPF clean. However, at that place are many highly rated DPF cleaners that can assist with keeping the filter clean. They are able to practise this lowering the temperature required for regeneration, which helps to clear the clogged filter.

Remove the DPF from the Exhaust System

The DPF delete is an appealing aspect if you are having issues with your DPF. It is true, without a DPF, y'all volition have no issues and in fact, your functioning volition increment with a remap or tuning of the ECU.

Nevertheless, the DPF removal may be illegal is your country and it volition cause more ecology harm. Although the latter will not be your biggest concern.

Accept You Bought The Wrong Car?

The toll of cleaning or replacing your DPF can be expensive. For the majority of DPF's, if you lot are in the region of 70 to 85% it will exist eligible to be cleaned. Any higher than 85%, the DPF will need to exist replaced with a new arrangement.

Many people bought diesels as it was marketed as the "fuel for saving the planet". However, they did not bet on having bug such as DPF failure on relatively new cars costing thousands.

Information technology is not the Diesel fuel Particulate Filters fault the bulk of the time. Its your driving habits as the car owner and lack of noesis with mod diesel fuel cars.

If you are driving a few miles each day, your DPF will eventually surrender and repair bills volition outset piling upwards. A gasoline engine is perfect for short journeys and as every bit efficient on fuel.