Diesel particulate filters known as DPF are prone to issues if your diesel vehicle is not looked after as it should be, learn their problems and how to prevent them! Diesel vehicles made after 2000 were fitted with a DPF to limit the emissive power of particulate matter into the atmosphere. These filters lower emissions of harmful gases and the impact of diesel on the environment. However as an owner of a vehicle with DPF you need to make sure you are running the vehicle as you should to prevent the DPF clogging up.
Why does the DPF clog?
The DPF filters the emissions from the fuel, soot sits in the filter and limits the amount entering the atmosphere. Driving with additional engine faults causes excessive soot to clog up the DPF. The failure/clogging of the DPF is only a secondary result of poor engine running. This soot unfortunately tends to sit in the filter and clog causing your vehicle to usually throw up the engine management light. The vehicle may have a decrease in fuel efficiency and loss of power.
Diesels with a DPF filter need to carry out a regeneration. This is the process of burning off accumulated soot from the DPF. This prevents it from clogging and reducing the engine’s performance. For the vehicle to carry out an automatic regeneration there are a few stipulations. It requires roughly over a ¼ of a tank of fuel and be driven at a high speed for roughly 15-30 minutes. If your vehicle is used for town driving and short journeys, it will never have the chance to automatically carry out a regen which is when we see problems. This is where you need a mechanic to carry out a forced regen.
Forced regeneration.
Forcing a DPF regeneration can be done using a diagnostics tool. The vehicle needs to be driven for a certain amount of time, at a specific RPM and usually takes around 45 minutes. This can only be carried out if the DPF is no more than 60% clogged up. If its any more than that the DPF may need replacing. This wants to be avoided however as it is a pricey replacement.
Cleaners
We would recommend using the Liqui Moly Pro-Line Diesel System Cleaner ’ Reduces pollutant emissions, thus optimizing smoke opacity prior to emissions test. Successfully tested in international test bench analyses. Cleans injection nozzles, the entire fuel system and combustion chambers of any troublesome deposits. Prevents any seizing up and gumming up of nozzle needles. Optimizes the combustion process and restores the engine’s original performance.
Suitable for all diesel and turbocharged diesel engines with and without diesel particulate filter (DPF). Contents are sufficient for max. 70 l of fuel.
Application
To be added directly into the fuel tank. For preventive use during every inspection, after repairs to the fuel system, for treating problems’
This is not going to stop your DPF clogging however it will help to generally clean out the system when a vehicle is being driven correctly. You can find out more here!
If you’re having DPF problems give us a call on 01642 613825 or use our contact form ‘here’.
DPF problems and how to prevent them