numero9 Posted October 1, 2023 Share Posted October 1, 2023 Finally got round to fixings a rear in the boost hose, cleared the code and now one for the DPF has flashed up on ISTA as well as on the dash. I tried previously to force regen, coolant temp & exhaust temp all above required but I assume the dodgy boost hose fault kept it from happening. I get through the page on ISTA and it says regen requested but not active. Is there anything else which might stop this from happening? I've just filled up fuel and plan to go for a longer drive to try force it. Is there anyway for clean it out or force the regen another way? Is it easier to just rip it out and code it out? I'd rather not as I like to keep it as stock as possible Quote Link to comment Share on other sites More sharing options...
dj123 Posted October 1, 2023 Share Posted October 1, 2023 How have you driven for it to do a regen? It'll not do one sat idling, or bumbling along at 30 in stop/start traffic. Go sit on the motorway for 20 minutes and it'll get through a cycle. It does not start a regen until the driving conditions are right. Quote Link to comment Share on other sites More sharing options...
Clavurion Posted October 1, 2023 Share Posted October 1, 2023 Are there any active trouble codes on DDE? Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 1, 2023 Author Share Posted October 1, 2023 Yes I have a code on the DDE for the DPF pressure, I clear but it comes back so unsure how I'm supposed to force the regen when the code is active but the code is there because it needs a regen. Thinking if there is anything I can put down it to help stop the code temporarily enough to get the regen going Quote Link to comment Share on other sites More sharing options...
Ray112 Posted October 1, 2023 Share Posted October 1, 2023 Try driving with laptop around and keep clearing that fault, at one point it should start regen. Another option I have heard is people trick ECU to start regen with using little bit split hose for exhaust pressure sensor. This way they reduce dpf backpressure measured, after that you need to fit good hose back on. Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 1, 2023 Author Share Posted October 1, 2023 I have a friend who has a Delphi system who said he can try to do a static regen first to help clear some of the junk before doing a driving regen. It all gets up to temp and I have no other errors aside from a fogging sensor and something for climate control so I can see any other reason for it not to regen. Plan is to get it hot, pull over, clear codes, and try to force the regen. Will need a driver to force it. Another thing I noticed on the last oil change is that it was very runny like it had some fuel in so I wonder if it has tried to regen before and failed and dumped the fuel in the oil? Quote Link to comment Share on other sites More sharing options...
Ray112 Posted October 1, 2023 Share Posted October 1, 2023 (edited) 1 hour ago, numero9 said: I have a friend who has a Delphi system who said he can try to do a static regen first to help clear some of the junk before doing a driving regen. It all gets up to temp and I have no other errors aside from a fogging sensor and something for climate control so I can see any other reason for it not to regen. Plan is to get it hot, pull over, clear codes, and try to force the regen. Will need a driver to force it. Another thing I noticed on the last oil change is that it was very runny like it had some fuel in so I wonder if it has tried to regen before and failed and dumped the fuel in the oil? That's the problem with nearly clogged DPFs, sometimes ECU trying to start regen every time car has reached temperature, so basically you get regen every day, which is getting your oil diluted with diesel. Just had this issue with my workmate's Audi, 200 miles after oil service it was showing warning of too high oil level, and indeed it's was when checking on dipstick, plus noticeably stinking of diesel being nearly fresh oil. He just get DPF emptied, mapped out and happily driving now. Try to get running forced regeneration, but obviously keep an eye on it even if it does, because if exhaust backpressure remaining quite high, ECU will try to carry out regeneration one after another later on, which isn't good for engine oil. Another option is to remove and professionally backflush DPF, there are places that does it in UK. One in east Yorkshire is called "DPF repair", not sure if they have multiple branches across the country, but must be quite a few offering this service. Edited October 1, 2023 by Ray112 Quote Link to comment Share on other sites More sharing options...
Clavurion Posted October 1, 2023 Share Posted October 1, 2023 5 hours ago, numero9 said: Yes I have a code on the DDE for the DPF pressure, I clear but it comes back so unsure how I'm supposed to force the regen when the code is active but the code is there because it needs a regen. Thinking if there is anything I can put down it to help stop the code temporarily enough to get the regen going Like Ray suggested. Activate the regen request. Go for a drive going first 40-60 mph as steady foot as possible and keep clearing trouble codes. The regen should start at some point. So far i've not encountered any failure on this but sometimes it can take up to 30 mins to start the process. First the regen will be in short periods and you have to keep clearing any active codes. Eventually the fault frequency will be longer and the regen will stay active all the time. Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 2, 2023 Author Share Posted October 2, 2023 Luckily I have a large drum of oil so I'm going to try the drive to regen whilst clearing codes & if that doesn't work try Delphi forced regen. I'll do oil change straight after and see where that goes. I'm based in South so any dpf places anybody can recommend? Quote Link to comment Share on other sites More sharing options...
Gonzo Posted October 2, 2023 Share Posted October 2, 2023 BImmertool will constantly clear codes (check box on the DPF regen screen for it) to help the regen happen. Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 2, 2023 Author Share Posted October 2, 2023 I think I have a USB-OTG cable, so I can try the bimmertool lite to see if it works and if so will download the full app. Frustrating that ISTA doesn't have the ability to constantly clear codes as a checkbox when requesting a regen as the only code stopping is that it needs a regen! Thanks for the help though Gonzo, as always much appreciated! 1 Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 4, 2023 Author Share Posted October 4, 2023 (edited) Downloaded the full bimmer-tool and got it working. No fault codes aside from the dpf but now i-drive is showing high oil level, would this impact regen ability? Soot mass-57g (99%) Ash mass-36g Regen requested okay but the regen active kept dropping in and out continuously. Took an hour to get the soot down to 0% but after that it climbed right back up to 13% and kept going as I drove back home. Absolutely zero affect on the ash mass which is frustrating, is this normal? Or will it eventually do the ash once it sorts the regen out or do I need to spray anything down to help? Back pressure has definitely dropped after the run, plan next is to fill up and try again but unsure if that will help, any more advice? Back pressure (hPA) Pre-RPM Pre-Regen Post-RPM Post-Regen 680 41 678 15 1858 188 1810 59 2745 274 2782 122 3604 454 3760 182 Edited October 4, 2023 by numero9 Quote Link to comment Share on other sites More sharing options...
Clavurion Posted October 4, 2023 Share Posted October 4, 2023 The soot mass is just a calculated value with no real relevance on actual situation. If the back pressure is normal things are good and there shouldn't any trouble codes unless we are talking about he DPF aging code which can be resolved by telling DDE the DPF has been renewed. Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 4, 2023 Author Share Posted October 4, 2023 Could it be that there is too much ash in it which needs cleaning out? It's just under 150k old! What is the normal figures for back pressure? Quote Link to comment Share on other sites More sharing options...
Gonzo Posted October 5, 2023 Share Posted October 5, 2023 DPF will need mechanically cleaning off the car using a forced chemical & water machine. Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 5, 2023 Author Share Posted October 5, 2023 2 hours ago, Gonzo said: DPF will need mechanically cleaning off the car using a forced chemical & water machine. Any chemicals you'd recommend? Easy enough to do with drive on ramps or will it need something proper? Quote Link to comment Share on other sites More sharing options...
Ray112 Posted October 5, 2023 Share Posted October 5, 2023 2 minutes ago, numero9 said: Any chemicals you'd recommend? Easy enough to do with drive on ramps or will it need something proper? You need to remove DPF filter and connect it to machinery which flushes it backwards. Not something you can do at home I'm afraid, apart from removing DPF and taking to place which does cleaning. They usually provide before and after flow check printouts etc. At home you can flush it backwards with pressure washer, but how effective it is I don't know. People have done it, some says it's fine, some having issues soon after. Of course it's important why dpf is clogged first place. A lot of times people don't replace failed thermostats and even professionally cleaned/new DPF will get clogged soon again. And like mentioned above, it's just very rough estimate about ash and soot levels, there are no sensors telling this. It's all calculated from back pressure, mileage etc. Quote Link to comment Share on other sites More sharing options...
numero9 Posted October 5, 2023 Author Share Posted October 5, 2023 (edited) Understood, any place in the south (around oxfordshire) that people can recommend? Given other things I'd be happy for somewhere to do the removal, clean and refitting as I just don't have time to do it all right now. What kind of price would something like this be? I cannot quite understand why it has clogged, its 150k I have done a lot of urban driving with less long journeys so that is a key factor, no other error codes and all temps seem to be reading fine. I haven't checked the injectors but unsure what I'd be looking for? Anything else to look for? How would I check if the any of the pressure sensors are failing and causing excess readings? Edited October 5, 2023 by numero9 Quote Link to comment Share on other sites More sharing options...
dj123 Posted October 5, 2023 Share Posted October 5, 2023 3 hours ago, numero9 said: Understood, any place in the south (around oxfordshire) that people can recommend? Given other things I'd be happy for somewhere to do the removal, clean and refitting as I just don't have time to do it all right now. What kind of price would something like this be? I cannot quite understand why it has clogged, its 150k I have done a lot of urban driving with less long journeys so that is a key factor, no other error codes and all temps seem to be reading fine. I haven't checked the injectors but unsure what I'd be looking for? Anything else to look for? How would I check if the any of the pressure sensors are failing and causing excess readings? On Bimmertool use the actual values and expected values. That'll give you an idea of if you are seeing what the car is expecting - easy enough to see if it's massively out of kilter. A bad throttle valve can prevent/stop a regen happening. They are known to fail as oil gets into the mechanism/electrics. When i first picked up my car it was not doing a DPF regen and there was a code for it (as it was so bad). When i opened it up was full of oil. I replaced it and it was all good from there in terms of DPF regen and performance. Quote Link to comment Share on other sites More sharing options...
Gonzo Posted October 5, 2023 Share Posted October 5, 2023 150k into a lifetime based on 180k, not unusual at all. I'm getting to the stage where I need mine doing as well. Quote Link to comment Share on other sites More sharing options...
LF-E61 52OD Posted October 6, 2023 Share Posted October 6, 2023 (edited) I have just removed my DPF from scrapped 265,000 mile 520D. It looked really good and is in my spares now. I always checked it regened when I remembered but it never had any work done to it. Back pressure would be good to check as you say. I was expecting issues. Tended to do long journeys not town traffic very often. The inlet was sooty, the outlet was squeeky clean. I have just reset the DPF warning for changing on my 130k 520D. I do not feel worried now. Does your just need the warning resetting - I did not make a note of the code but found enough on forums to suggest it was just in need of a reset. I used bimmer tool to reset it. Outlet outlet Inlet inlet Edited October 6, 2023 by LF-E61 52OD extra bit about bimmertool regen. Quote Link to comment Share on other sites More sharing options...
Ray112 Posted October 6, 2023 Share Posted October 6, 2023 That's impressive, 265k on original DPF. Just proves that long journeys and correctly working engine will keep it service free for car lifespan. Quote Link to comment Share on other sites More sharing options...
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