2nd...lol.
Anyway, as the title suggests, I'm having what I think are DPF issues, and can't seem to work out what the problem is. Focus forum hasn't been a huge amount of help either, so I've got nothing to lose by asking here.
Basically, it seems to be regenerating (or trying to) far too often. And is causing the silent fault code as seen below -
![[Image: IMAG4031_zpsa7f1a27c.jpg]](http://i796.photobucket.com/albums/yy247/Toms306_photos/A%20Focus/IMAG4031_zpsa7f1a27c.jpg)
The signs of it regenerating are poor mpg and the fans running during the event and after switching off the engine, despite the coolant staying at a constant 78c. The stat should open at 88c, but 78c is what the temp sensor is measuring via the OBD port. Also, the engine feels a bit 'lethargic' when this happening. It's not bad, most people probably wouldn't even notice, just not as sharp as normal.
I decided to take some live diags using Forscan, the important one is the blue one, DPF pressure differential, which peaks at 9kPa...is that good or bad? No-one seemed to know...
![[Image: IMAG4100_zpsd91c1892.jpg]](http://i796.photobucket.com/albums/yy247/Toms306_photos/A%20Focus/IMAG4100_zpsd91c1892.jpg)
I then did the forced regen 10 days ago, video is on the other thread. Then did the above test again...and the pressure peaked at 9kPa again!
Still no idea if that's good or bad.
![[Image: IMAG4101_zps0aef78aa.jpg]](http://i796.photobucket.com/albums/yy247/Toms306_photos/A%20Focus/IMAG4101_zps0aef78aa.jpg)
Anyway, following that, the car felt much better for several days, with just a brief regen when it got to 47,700 miles, which is normal as it should do around every 500 miles, this was finished before I even got home. No fans running after switch off. No noticeably poor mpg. No lethargic running.
On Friday I filled up with fuel. For those that don't know, the Eolys is dosed when the fuel flap is closed after a fill up. I also reset all 'user' values on the dash, to see what mpg I average over this tank.
And instantly the car felt worse, the lethargy was back... Despite a hot engine and fairly 'easy' 12 mile B road drive home, I only got 51mpg! Admittedly with a couple of overtakes, but still shouldn't be that bad starting with a warm engine! Got home and yep, the fans are running on, though the coolant is still at 78c.
Then today, mpg climbed while the engine was cold, even at 70 was climbing and peaked at 59mpg...when it suddenly started dropping off, regen started I assume. Got progressively worse, down to 53mpg, fans on when I parked again. On the way home stopped at supermarket, fans on again, mpg still poor. Left the supermarket and mpg started to climb again, after the B road (where I only got 51mpg on a warm engine Friday) had reached 57mpg average...yet the fans were still on when I parked up.
If you've got through that, well done lol. I'm actually really interested in this sort of tech, don't know why lol, but I'd much rather learn about it, understand it and understand where the fault lies rather than just smashing the DPF out and using 'old' methods lol. So if anyone has any ideas what could be the problem, where to check, or even if that differential pressure is good or bad I'd be be interested to hear it!
Cheers
Tom
Anyway, as the title suggests, I'm having what I think are DPF issues, and can't seem to work out what the problem is. Focus forum hasn't been a huge amount of help either, so I've got nothing to lose by asking here.
Basically, it seems to be regenerating (or trying to) far too often. And is causing the silent fault code as seen below -
![[Image: IMAG4031_zpsa7f1a27c.jpg]](http://s796.photobucket.com/user/Toms306_photos/media/A%20Focus/IMAG4031_zpsa7f1a27c.jpg.html)
The signs of it regenerating are poor mpg and the fans running during the event and after switching off the engine, despite the coolant staying at a constant 78c. The stat should open at 88c, but 78c is what the temp sensor is measuring via the OBD port. Also, the engine feels a bit 'lethargic' when this happening. It's not bad, most people probably wouldn't even notice, just not as sharp as normal.
I decided to take some live diags using Forscan, the important one is the blue one, DPF pressure differential, which peaks at 9kPa...is that good or bad? No-one seemed to know...
![[Image: IMAG4100_zpsd91c1892.jpg]](http://s796.photobucket.com/user/Toms306_photos/media/A%20Focus/IMAG4100_zpsd91c1892.jpg.html)
I then did the forced regen 10 days ago, video is on the other thread. Then did the above test again...and the pressure peaked at 9kPa again!
Still no idea if that's good or bad.![[Image: IMAG4101_zps0aef78aa.jpg]](http://s796.photobucket.com/user/Toms306_photos/media/A%20Focus/IMAG4101_zps0aef78aa.jpg.html)
Anyway, following that, the car felt much better for several days, with just a brief regen when it got to 47,700 miles, which is normal as it should do around every 500 miles, this was finished before I even got home. No fans running after switch off. No noticeably poor mpg. No lethargic running.
On Friday I filled up with fuel. For those that don't know, the Eolys is dosed when the fuel flap is closed after a fill up. I also reset all 'user' values on the dash, to see what mpg I average over this tank.
And instantly the car felt worse, the lethargy was back... Despite a hot engine and fairly 'easy' 12 mile B road drive home, I only got 51mpg! Admittedly with a couple of overtakes, but still shouldn't be that bad starting with a warm engine! Got home and yep, the fans are running on, though the coolant is still at 78c.
Then today, mpg climbed while the engine was cold, even at 70 was climbing and peaked at 59mpg...when it suddenly started dropping off, regen started I assume. Got progressively worse, down to 53mpg, fans on when I parked again. On the way home stopped at supermarket, fans on again, mpg still poor. Left the supermarket and mpg started to climb again, after the B road (where I only got 51mpg on a warm engine Friday) had reached 57mpg average...yet the fans were still on when I parked up.
If you've got through that, well done lol. I'm actually really interested in this sort of tech, don't know why lol, but I'd much rather learn about it, understand it and understand where the fault lies rather than just smashing the DPF out and using 'old' methods lol. So if anyone has any ideas what could be the problem, where to check, or even if that differential pressure is good or bad I'd be be interested to hear it!
Cheers
Tom