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Detecting a Regen

2594 Views 9 Replies 8 Participants Last post by  Mike19
Those with a fuel computer,

Coasting with throttle off, mpg is around 70 NOT the usual 999.9

Stationary it's around 7 to 9 (can't remember the units, gallons per hour ?) NOT the usual 1 to 3

Those without, it's probably a little more difficult. Thee is a marked change in response which I have started to recognise. I reset the trip at the end of the regen and then plan a run out to cover the next.
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I know when its having a regen by the gear change. Usually a little jerky,especially 1st to 2nd. I usually drive in 5th and keep the revs at just above 2000 for about 20 mins does the trick (obviously on the motorway
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Mine feels absolutely no different at all. Only clue is the loss of the 999.9 as you say. I clocked my last regen and it was 1500 miles from the previous. I don't get a 500 mile interval. I have never seen the light other than at the dash test on start up. I do mostly motorway and hard driving. I look for regens all of the time. It's become an obsession! I have a chip fitted which on the original setting did give a difference at regen time. Computer went all over the place.

Since then I have turned it up and you simply can't tell when it's doing it's dirty business. Also still on 37.3 mpg with hard driving. I must just be making less soot than others.
I see 999 and 0.2g/h have never seen 70 or "1 to 3"

SE Nav 184PS Auto6 4x4 with 13k+ on the clock and I reckon I've done 6k of that myself.

I have never seen, heard or smelt it do a regen, ever.

I do not get 500 mile interval. You only get that if you drive too soft (read the manual).

Recent Viezu remap too soon to tell but has raised the grunt level considerably and improved mpg a little.
Do you guys get an alarm going off every couple of minutes during a regen along with the yellow flashing warning light (today was my first experience of a regen ,a tad unsettling ) ,buy the way i didn't really notice any tail-off in performance and driveability . But i have another question,what happens if car is turned off during a regen ? .
By the time you get the alarm and flashing light the need for a regen has become critical. If you cannot get out for a suitable run or it does not clear on a run, you need to get to a dealer for a forced regen.
When it does this you need to continue the run until the regen completes, not just stop when the light goes out!
Just a thought, mine is an automatic, by knocking the stick over into manual I find that the car is not normally in top gear during urban driving, it will be in third, fourth or fifth. Nor will it let me push it up a cog manually unless the revs are right. , and it will change down by itself in 'M'. Lazy cruise revs is about 1850rpm, but it won't go lower (idle is ~750rpm). It rarely gets into sixth on an A-road, only on a motorway e.g. A34 ;-)

This makes me think that if you manual types are putting it into top during normal driving, you are not keeping the revs up high enough to keep the DPF clear. OTOH you will get better mpg that I can achieve.
Why on earth would you want to use top gear in normal driving? 6th is best at 60 mph plus and useless below 50 as frar as I am concerned.
jefrs said:
Just a thought, mine is an automatic, by knocking the stick over into manual I find that the car is not normally in top gear during urban driving, it will be in third, fourth or fifth. Nor will it let me push it up a cog manually unless the revs are right. , and it will change down by itself in 'M'. Lazy cruise revs is about 1850rpm, but it won't go lower (idle is ~750rpm). It rarely gets into sixth on an A-road, only on a motorway e.g. A34 ;-)

This makes me think that if you manual types are putting it into top during normal driving, you are not keeping the revs up high enough to keep the DPF clear. OTOH you will get better mpg that I can achieve.
I have an auto, and I find my normal cruising speed onnon-dual carriagewayroads is 60 at just a little over 1500 revs.

Even though you have a manual option on the auto box, it is designed to not let the engine be too far out of the correct range of revs. That's why it will change gear automatically sometimes when you are using the manual option.

The Antara has a pre-programmed DPF regeneration cycle. It doesn't really matter how you drive the car, it will still be doing a regen at a set interval of about 500+ miles. My car does the regen at an average of 522 miles, and this has never changed since the car was new. If you have never seen a DPF regen cycle, I would suggest you have a car which has had the DPF removed.
Mine seems to do a DPF regen about every 520 miles, if I have stopped just after a regen the car outside is very hot, I noted this on its very first regen, the only other thing is that on occasions the cooling fan seems to run on after I have stopped,I have assumed this is after a regen. I have not had any warnings or lights lit on the dash so I have assumed this is all normal for the car..I have recently driven th Antara at over 100 miles an hour (solo) whereas normally I would be towing, I really do love this car, so far I have about 7000 miles on the clock, so far so good. Merry Christmas.
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