3 way catalyst DPF's work by post injecting fuel, this oxidises in the catalyst and DPF and it's this reaction that generates the 600c+ temperatures needed to combust the soot. On high mileage vehicles the problem is usually ash accumulation. This cannot be burned off and and this can be difficult to remove without professional cleaning.
I don't see how it reheats fuel when there is non in the cylinders before engine turns over? I might be wrong but the tip of the glow plug gets hot in the cylinder to heat up the volume. Fuel doesn't pass through the glow plug or anywhere near it
@@ADM_K If you google "What are glow plugs" it gives a description, if you click on the "People also ask" - "What does a glow plug do?" It says it heats the fuel n air.
@@theenglishtrucker1849 yeah i did google straight after the first reply but I don't see how it does small engine like this one. Larger marine/industrial/truck engine is simple to see how it heats up fuel too. I've replaced glow plugs on cars before the coil light goes out there is no fuel in cylinder just air and fuel only gets sprayed in once the engine turns over. I'm not saying im right and youre wrong. I just dont see it
Nope, glow plugs pre heat the combustion chamber , they do not heat the fuel, the diesel ignites with heat created by the high compression of the inlet charge.
Some makes, like VW, in the owners handbook, tell you how to clear your DPF bu driving at certaqin speeds for certain distances....BUT it only works a few times, then it's replacement time at a horrendous price. Just another reason why diesel is SHITE !!!
Most cars tell you that but once the pressure is too high and car goes into limp mode they won't regen no matter how you drive. I've owned skoda octavia with adpf I ended up deleting it and it still passed emissions test
Diesels aren’t shite. The vast majority of owners buy them to try and get frugal MPG. Then proceed to use them to do a shit load of short journeys. Compounding the issue is a lot of people don’t look after them and continue to drive them when there is an issue. The vast majority of DPF issues are due to an underlying fault.
@@ADM_K exactly, I’ve watch Jimmy for a good while and the lack of knowledge in the industry about DPF’s is unbelievable. They do a forced regen and reset the soot percentage and call it a day. No attempt to find the root cause.
Nice to see people doing it correctly not just doing static regens. Great vid.
Thanks. I've learned lesson when a mechanic melted my dpf force regening dpf on my Octavia scout
Good video and explained very clearly, thank you
Good effort mate, very informative 👍
was tempted to delete it but this turned out to be cheaper but this truck is testing my patience
3 way catalyst DPF's work by post injecting fuel, this oxidises in the catalyst and DPF and it's this reaction that generates the 600c+ temperatures needed to combust the soot. On high mileage vehicles the problem is usually ash accumulation. This cannot be burned off and and this can be difficult to remove without professional cleaning.
the issues is that most mechanics just force regen and melt the dpf
Loving the production (video) quality boost just the sound sound is awful
already working on that
Saved for later use
Question? My car is in limp mode so can’t self regen the DPF so would this foam work in my car circumstances?
What car is it. Yes it would work to break down the carbon but you need to find out why it didn't self regen
What’s the brand and type of the OBD scanner please?
Thanks
Topdon artidiag500
The glow plug is the diesel spark plug. It heats the fuel and air so it combusts. It doesnt heat the cylinders.
I don't see how it reheats fuel when there is non in the cylinders before engine turns over? I might be wrong but the tip of the glow plug gets hot in the cylinder to heat up the volume. Fuel doesn't pass through the glow plug or anywhere near it
@@ADM_K If you google "What are glow plugs" it gives a description, if you click on the "People also ask" - "What does a glow plug do?" It says it heats the fuel n air.
@@theenglishtrucker1849 yeah i did google straight after the first reply but I don't see how it does small engine like this one. Larger marine/industrial/truck engine is simple to see how it heats up fuel too. I've replaced glow plugs on cars before the coil light goes out there is no fuel in cylinder just air and fuel only gets sprayed in once the engine turns over. I'm not saying im right and youre wrong. I just dont see it
They warm up the combustion chamber enviroment as well.
Nope, glow plugs pre heat the combustion chamber , they do not heat the fuel, the diesel ignites with heat created by the high compression of the inlet charge.
Some makes, like VW, in the owners handbook, tell you how to clear your DPF bu driving at certaqin speeds for certain distances....BUT it only works a few times, then it's replacement time at a horrendous price. Just another reason why diesel is SHITE !!!
Most cars tell you that but once the pressure is too high and car goes into limp mode they won't regen no matter how you drive. I've owned skoda octavia with adpf I ended up deleting it and it still passed emissions test
Diesels aren’t shite. The vast majority of owners buy them to try and get frugal MPG. Then proceed to use them to do a shit load of short journeys. Compounding the issue is a lot of people don’t look after them and continue to drive them when there is an issue. The vast majority of DPF issues are due to an underlying fault.
True. Also many mechanics aren't well trained to work on them so they just force regen them
@@ADM_K exactly, I’ve watch Jimmy for a good while and the lack of knowledge in the industry about DPF’s is unbelievable. They do a forced regen and reset the soot percentage and call it a day. No attempt to find the root cause.
yeah a mechanic melted my dpf on my octavia by doing 3 force regens in a row