What causes the exhaust filter to run lean?
What causes the exhaust filter to run lean?
Deceleration increases the amount of oxygen following through the engine and exhaust system. This in turn raises the temperature of the GPF to around 400c – 700c, igniting the soot contained within the filter. In conditions where this is not possible, the vehicles engine management systems alter timing causing it to run lean.
What should I do if my diesel particulate filter is blocked?
A hot, acrid smell from the exhaust. If you get a warning light showing that the filter’s blocked, it should be possible to complete an active regeneration cycle and clear the warning light by driving for 10 minutes or so at speeds over 40mph.
Is the diesel particulate filter part of the exhaust?
The Diesel Particulate Filter (DPF) is part of your exhaust and controls the ‘soot’ that would otherwise be expelled from the system. You may have noticed that modern diesels no longer leave you in a cloud of smelly black smoke when they accelerate off. The filter…
How to reset / regenerate / clear your DPF warning light?
It’s at this point the warning light will come on and your intervention is required. How to clean, clear and reset (regenerate) the system. You should drive your vehicle for approximately 15 minutes keeping the engine revs between 2000 – 2500 rpm.
What’s the best way to clean the exhaust filter?
This requires injecting a small quantity of fuel into the exhaust stream for a short duration and elevating exhaust temperatures to clean the filter. It’s important to remember that, in most applications, active regeneration cleaning occurs only when passive regeneration isn’t possible based on temperature, load and speed.
Deceleration increases the amount of oxygen following through the engine and exhaust system. This in turn raises the temperature of the GPF to around 400c – 700c, igniting the soot contained within the filter. In conditions where this is not possible, the vehicles engine management systems alter timing causing it to run lean.
How does a John Deere exhaust filter work?
John Deere engines and exhaust filter components are designed for uninterrupted operation using passive regeneration, a natural cleaning process where engine exhaust temperatures are sufficient to oxidize the particulate matter (PM) trapped in the exhaust filter.
What to do if your diesel particulate filter stops working?
This is a last resort solution that the engine uses to try and save the filter. If your vehicle is in limp mode you may be able to save the filter, but you will need to use a scan tool. Take the car to a certified technician who can run a forced regeneration program to try and save the filter.
