E9x 330d M57 - Carly DPF figures and ABS/DSC advice please
Discussion
Hi fellow BMW beards, I'm hoping for some advice please on the above.
My 2007 E92 recently developed a loss of power <2k rpm that I have now resolved after a lot of reading up and replacing of the usual suspects, coupled with Carly diagnostics. I'm not 100% on the exact fix as I carried out some preventative maintenance whilst I was at it, but have cleaned and tested the EGR function by applying vacuum manually, replaced the MAP sensor and seal (it was split, I think this was possibly the cause), replaced the EGR pressure converter and all vacuum lines (with the exception of the engine mount ones that look rather difficult on axle stands).
Annoyingly at no point did the car throw codes for anything except when I was unplugging things to aid fault finding. It now seems to be driving fine again and the MPG seems normal, but having been monitoring values to aid fault finding I've noticed the DPF seems to regenerate much more than I would expect given almost all my driving is motorway with a bit of faster A road mixed in.
Carly isn't showing any codes regarding DPF but it's regenerating every 150 miles or so. After each successful regeneration it climbs from 0 to 24.84g of soot over the space of 5 miles at 75mph, then sits at 24.84 for the next 80 or so, before climbing again. Ash mass is currently showing 12.78g and soot 28.24g
The car is on 144k miles, but the last 32k of them have been this usage profile of mostly motorway cruising. Of course the DPF could be full but reset by a previous owner.
Carly shows 1012.89 hpa of ambient pressure (which matches today's forecast here) but 1007.89 hpa exhaust gas pressure with the engine off - does this seem correct? With the engine on the figure does change with revs so the sensor is reading. Differential pressure is around 7 hpa at idle.
Should the DPF be regenerating this often with the type of driving I am doing? Do those figures seem normal? What else can I look at if this is not correct?
In addition, I was getting an intermittent Christmas light dash with the usual ABS/DSC/handbrake but it was very rare, before now being mostly on. I have read that this is often the ABS/DSC pump but on inspection mine has an anti-tamper seal from ECUTESTING which suggests a previous repair with a lifetime warranty. I've replaced the two rear wheel speed sensors with Bosch ones as a best guess but no change. The car isn't showing any codes on Carly, even when the car itself is telling me it's broken - any advice on this please?
There aren't any good specialists in my neck of the woods and my previously favoured local garage lost my custom after leaving the rear engine cover unbolted, the strut brace un-torqued and a pry bar under the bonnet after an air filter change... so since that I've been largely doing my own maintenance so it's done properly.
Since this is a rather long and boring post, here's a pic of my previous beloved 330ci, because everyone loves pictures. Points to anyone who can identify the car park.
My 2007 E92 recently developed a loss of power <2k rpm that I have now resolved after a lot of reading up and replacing of the usual suspects, coupled with Carly diagnostics. I'm not 100% on the exact fix as I carried out some preventative maintenance whilst I was at it, but have cleaned and tested the EGR function by applying vacuum manually, replaced the MAP sensor and seal (it was split, I think this was possibly the cause), replaced the EGR pressure converter and all vacuum lines (with the exception of the engine mount ones that look rather difficult on axle stands).
Annoyingly at no point did the car throw codes for anything except when I was unplugging things to aid fault finding. It now seems to be driving fine again and the MPG seems normal, but having been monitoring values to aid fault finding I've noticed the DPF seems to regenerate much more than I would expect given almost all my driving is motorway with a bit of faster A road mixed in.
Carly isn't showing any codes regarding DPF but it's regenerating every 150 miles or so. After each successful regeneration it climbs from 0 to 24.84g of soot over the space of 5 miles at 75mph, then sits at 24.84 for the next 80 or so, before climbing again. Ash mass is currently showing 12.78g and soot 28.24g
The car is on 144k miles, but the last 32k of them have been this usage profile of mostly motorway cruising. Of course the DPF could be full but reset by a previous owner.
Carly shows 1012.89 hpa of ambient pressure (which matches today's forecast here) but 1007.89 hpa exhaust gas pressure with the engine off - does this seem correct? With the engine on the figure does change with revs so the sensor is reading. Differential pressure is around 7 hpa at idle.
Should the DPF be regenerating this often with the type of driving I am doing? Do those figures seem normal? What else can I look at if this is not correct?
In addition, I was getting an intermittent Christmas light dash with the usual ABS/DSC/handbrake but it was very rare, before now being mostly on. I have read that this is often the ABS/DSC pump but on inspection mine has an anti-tamper seal from ECUTESTING which suggests a previous repair with a lifetime warranty. I've replaced the two rear wheel speed sensors with Bosch ones as a best guess but no change. The car isn't showing any codes on Carly, even when the car itself is telling me it's broken - any advice on this please?
There aren't any good specialists in my neck of the woods and my previously favoured local garage lost my custom after leaving the rear engine cover unbolted, the strut brace un-torqued and a pry bar under the bonnet after an air filter change... so since that I've been largely doing my own maintenance so it's done properly.
Since this is a rather long and boring post, here's a pic of my previous beloved 330ci, because everyone loves pictures. Points to anyone who can identify the car park.
Edited by Spitfires on Monday 16th May 21:35
Edited by Spitfires on Monday 16th May 21:37
I think gave some advice re e-mail. Re abs faults etc, I recommend reading the fault memory. If no faults read all live data that can affect abs. I had a faulty wheel speed sensor that gave no fault code but read incorrect direction of rotation. Symptom was car was speed/power limited and cruise n/w over a certain speed.
Re dpf I think you have no swirl flaps. Some find this doesn’t affect regens. I found my dpf blocked with them removed.
Re dpf I think you have no swirl flaps. Some find this doesn’t affect regens. I found my dpf blocked with them removed.
helix402 said:
I think gave some advice re e-mail. Re abs faults etc, I recommend reading the fault memory. If no faults read all live data that can affect abs. I had a faulty wheel speed sensor that gave no fault code but read incorrect direction of rotation. Symptom was car was speed/power limited and cruise n/w over a certain speed.
Re dpf I think you have no swirl flaps. Some find this doesn’t affect regens. I found my dpf blocked with them removed.
Hi Helix, yes you replied on your thread thank you to say that you didn't think the Carly values were accurate. I didn't want to derail your thread by continuing to discuss it there. Regardless of whether the soot/ash levels are accurate (other threads seem to suggest they only report info from the DDE) the car is regenerating every 150 miles or so even with my motorway use. You're right in that I don't have swirl flaps, but my problem is what I think are too frequent regens and not that it won't regen at all.Re dpf I think you have no swirl flaps. Some find this doesn’t affect regens. I found my dpf blocked with them removed.
ABS/DSC wise, I've read the issues you had and the fix on your thread. I've already swapped the two rear sensors as a best guess as Carly doesn't appear to read live wheel speed/rotation data and I don't have ISTA etc. I think I'll have to try to find a specialist and leave it with them for a bit, rather than effectively playing sensor change roulette.
I'm thinking it is a wheel speed sensor or reluctor ring issue as the car doesn't throw up the warning lights until approx 20 mph - I would imagine if it was the pump unit itself it wouldn't be speed dependent?
Thanks again for your input
Edited by Spitfires on Tuesday 17th May 18:26
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