The Clogged FAP It's a nightmare for every driver with a diesel car. But before you rush to the mechanic and shell out hundreds of euros, it's worth trying do-it-yourself cleaningDoes it really work? It all depends on how bad your filter is.
Why the FAP gets clogged
The particulate filter born for catch the dirt that come out of your diesel engine. Unfortunately, it often ends up becoming a bottleneck. The fault? Mainly yours, if you always drive in the city, only making short trips.
The FAP needs to high temperatures to burn off the accumulated soot, but in city traffic it never gets there. Result: progressive accumulation of particulate matter Which ultimately blocks everything. Even worse is when you interrupt regenerations by turning off the engine at the wrong time.
Other culprits? Thewrong engine oil (never use the normal one on diesels with FAP) and engine problems such as dirty injectors or faulty EGR valve.
Tank Additives: The Simplest DIY Cleaning Solution
The most accessible DIY cleaning comes from additives that you pour directly into the tank. They are inexpensive, no tools are needed and they work quite well on light blocks.
These products lower the temperature needed to burn the soot, allowing the FAP to self-cleaning Even while driving in the city. Perfect as a preventative measure or when the warning light has just come on.
The trick? Pour them with the half-empty tank to make them more focused, then do at least 20 minutes of constant speed highwayThe engine must be nice and warm.
Spray kit: when you need something more aggressive
For the most stubborn blockages, there are the spray kit with flexible probeHere, DIY cleaning becomes more technical: you have to remove a sensor and spray the product directly into the filter.
These detergents dissolve the deposits They're harder and reach areas that tank additives don't. After application, it's essential to thoroughly regenerate them, otherwise the dissolved residues will remain there and cause damage.
Professional detergents: the heavy artillery
More concentrated products require external applicators such as guns or pumps. Serious stuff for significant deposits impossible to affect with other methods.
The procedure is more complex: cold engine, removing the temperature sensor, intermittent injection of the product. But the results can be surprisingly effective even on very compromised FAPs.
Limitations of DIY cleaning
Be realistic: DIY cleaning has its limitations. Additives work primarily on carbonaceous soot, but they are almost useless against the ash that accumulates over time.
If the DPF is severely clogged, especially after years of incorrect use, it will be difficult to restore it to its original state with chemical products alone. In these cases, the only solution is professional intervention with ultrasonic cleaning or replacement.
Prevention: better than any cure
Want to avoid problems? Change your habits. At least once a week, do a nice trip on the highway 20-30 minutesThe FAP will thank you by burning all the accumulated junk.
Always use Low-SAPS oil And never interrupt automatic regenerations. Small tricks that will save you a lot of money.