Deleted
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Post by Deleted on Jun 16, 2017 17:12:26 GMT
I consider myself to be reasonably technically sympathetic (unlike Espadrille) but when I read on the HJ forum that people know when their car is regenerating I am stumped. I have no idea if my car acts like Dr Who or not, and if it does, when it does it.
Presumably the more long distance journeys undertaken, the less frequent such regenerations are? Do they even need to regenerate if you drive like Humph and do 40,000 miles a year?
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WDB
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Post by WDB on Jun 16, 2017 20:28:16 GMT
Little and often, I imagine. If the exhaust is routinely hot, the soot burns off naturally and there's no need for a forced burn. 20,000 miles into DPF ownership with my 325d, I've never noticed anything that might be regeneration.
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Rob
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Post by Rob on Jun 16, 2017 21:59:56 GMT
My Passat sometimes had the fan running for a while after stopping the car... I believe that was an indicator of an active regeneration.
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WDB
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Post by WDB on Jun 16, 2017 23:03:40 GMT
Possibly, but I've had cars do that since the 1990s, long before DPFs were thought of.
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Post by tyrednexited on Jun 17, 2017 6:40:32 GMT
...It was noticeable when both my Mondeo and Sportage went into regen mode.
Both of them became slightly "lumpy" (the Sportage more so), and in the correct circumstances it was possible to see the fuel consumption increase on the trip-meter.
Most noticeable, however, if it was in regen on exiting the car (or had been in regen shortly before) was the "hot" smell of the particulates being burnt off.
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Deleted
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Post by Deleted on Jun 17, 2017 22:37:08 GMT
Thanks. I have also experienced that 'hot smell' at times, but not too often. No other symptoms though.
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Post by Humph on Jun 18, 2017 8:56:13 GMT
I experience it regularly, but then again, I've always kept myself in fairly good shape...
😈
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WDB
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Post by WDB on Jun 22, 2017 22:01:44 GMT
I wonder if mine is doing it right now. Just drove it at moderate to high speed the ten miles home from the station car park Maidenhead. As I got out, I felt warmth round my ankles and, when I put my hand down, sure enough there was hot air emanating from under the door sill. The engine fan was still running too, but there was no burny smell. Now, it's a warm night and the car has been worked reasonably hard; it also had a long motorway run on Monday. But could it be doing a little private burn-up? Or is what I noticed just the effect of a hot cat on a hot day?
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Post by Humph on Jun 23, 2017 7:17:44 GMT
Has anyone near you mentioned that their cat is missing?
😉
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Post by Hofmeister on Jun 23, 2017 15:20:04 GMT
Had the cam belt, aux belt, and water pump done on the longboat.
As it had been drained and refilled, just for piece of mind I stuck the OBD reader on it to measure water temp for the next few hundred miles. As an aside, I noticed that one hard foot down charge up the A3, the cat bank 1 temp climbed to 500°c
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Deleted
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Post by Deleted on Jun 25, 2017 13:49:37 GMT
I've seen exhaust temps of 645°C from the OBD reader in my car when regenerating, normal temp is 280°C to 300°C. The obvious telltale in the car is using the instantaneous fuel consumption. When you let the car run with no throttle it will show 0.0l/100kms or 99.9mpg or 999mpg. When my own car is regenerating it will show between 2 and 3l/100kms with no throttle input. 3l/100kms is c. 93mpg so you may not notice if your car normally shows 99.9mpg on overrun.
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