Datatek
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Only light throttle opening required due to the light load, so not sure that would do much?
L322 2012 4.4 EGR Cleaning
- Thread starter Touronaut
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I think it would.
Gents I posted what was required from my remembering of the manual.
No need for stupid revs or loads to cycle a DPF regeneration if needed.
Here have a look not from the manual but seems to explain well the basics.
https://www.group1auto.co.uk/news/land-rover-tech-tips-diesel-particulate-filter-dpf
The manual goes through all sorts of explanations from altering turbo and injection to raise temps more than standard.
But the drive cycle has to be completed or full regeneration won’t happen.
As said earlier don’t see how it is related to the OP fault message but it’s a cheap check to start, as it was said a blast on the motorway helped, and also the recent driving history won’t help the DPF.
J
No need for stupid revs or loads to cycle a DPF regeneration if needed.
Here have a look not from the manual but seems to explain well the basics.
https://www.group1auto.co.uk/news/land-rover-tech-tips-diesel-particulate-filter-dpf
The manual goes through all sorts of explanations from altering turbo and injection to raise temps more than standard.
But the drive cycle has to be completed or full regeneration won’t happen.
As said earlier don’t see how it is related to the OP fault message but it’s a cheap check to start, as it was said a blast on the motorway helped, and also the recent driving history won’t help the DPF.
J
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So is driving around the block a few times in low axle. All you need is large quantities of hotter than is normally generated tootling about at 30 MPH and below exhaust gas going through the DPF.
The car does passive regeneration all the time it can get the temp required in the system, but it is not a complete regeneration process. And needs longer to complete. So a couple of times around the block may not do it. (Suppose that depends how big you block is
but the speed needs to be above 30mph)If the DPF is nearly full then it should show a message then you really do need to take for a good drive, active regeneration normally happens every 250 miles ish depends how car has been used but it needs a full cycle to do a complete regeneration. Maybe this explains the OP saying a blast does it good, but the city driving soon clogs it up again. But has never completed a full clean drive cycle.
Active regeneration does all sorts of fancy stuff with engine control to get temps way up above normal operating temps.
It can be forced with diagnostics if it is full full. But still needs the drive cycle.
J
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The car does passive regeneration all the time it can get the temp required in the system, but it is not a complete regeneration process. And needs longer to complete. So a couple of times around the block may not do it. (Suppose that depends how big you block is
If the DPF is nearly full then it should show a message then you really do need to take for a good drive, active regeneration normally happens every 250 miles ish depends how car has been used but it needs a full cycle to do a complete regeneration. Maybe this explains the OP saying a blast does it good, but the city driving soon clogs it up again. But has never completed a full clean drive cycle.
Active regeneration does all sorts of fancy stuff with engine control to get temps way up above normal operating temps.
It can be forced with diagnostics if it is full full. But still needs the drive cycle.
J
So does driving around in low axle, it depends how big the block is. Aim is to generate higher temps and gas flow. It's not bloody rocket science.
I am not sure what you are trying to get at.
Passive regeneration: DPF temps above 250°c, when driven at high engine loads and speed. Happens all the time during driving the car. But it does not do the proper full job.
Active regeneration : DPF temps temps 600°c controlled by, turbo vanes closed, throttle closed more, EGR closed, also fuel injection control. needs to be carried out at speed not less than 30 mph, continuous. Happens as stated every 250ish miles the car decides, depending on driving conditions.
No it’s not rocket science but you can’t get the temps high enough, the cars brain can, to clean DPF properly.
J
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You really don't understand engines do you?
Datatek
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Low range even flat out does not need a wide throttle opening, even if you have the pedal to the metal it will just hit the rev limiter, thus gas flow will not be high and nor will the temperatures, revs alone will not clean it.
RangeRoller dt
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Can a P38 low box be driven flat out or will it go bang? What can it take by design?
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I will leave it to you happy amateurs, cannot be arsed explaining or arguing with you so you carry on.
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So @Touronaut did you give it a good run? Or burn it down with you jumps leads
How did it go and are you still getting your fault?
Don’t worry about the BS/banter/ dick waving, in the middle of the thread it happens a lot
J
How did it go and are you still getting your fault?
Don’t worry about the BS/banter/ dick waving, in the middle of the thread it happens a lot
J
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What part of higher RPM producing extra heat and gas flow do you not understand.So @Touronaut did you give it a good run? Or burn it down with you jumps leads
How did it go and are you still getting your fault?
Don’t worry about the BS/banter/ dick waving, in the middle of the thread it happens a lot
J
