If you notice that regen has started (high consumption, exhaust noise, i-Stop engine indicator), just downshift a gear or two. When engine revs over 3000, regen is done in less than 5 minutes.
Jukkeli
It's odd...for the past few months I have not noticed my car doing an active DPF regen. Previously, it seemed to do it once per tank.
Car has 36,000km.
I always thought that if you did enough highway driving (as I do), the exhaust should get hot enough to regenerate the DPF ( a passive regen) without injecting the extra diesel into the exhaust (active regen). Maybe my car has just started working correctly?
Does anyone else do lots of highway travel ? If so how often do you notice an active regen?
Car has 36,000km.
I always thought that if you did enough highway driving (as I do), the exhaust should get hot enough to regenerate the DPF ( a passive regen) without injecting the extra diesel into the exhaust (active regen). Maybe my car has just started working correctly?
Does anyone else do lots of highway travel ? If so how often do you notice an active regen?
I notice in my normal driving that I get a regeneration roughly every 250km. I do very few trips longer than 12km. However when I am towing the caravan and the engine is working hard, I do not notice any regeneration happening which seems to support your "passive regeneration" with a hot engine theory.
When I notice that regeneration is in progress I try and keep the revs above 2000rpm, In fact when driving home from work I have a short motorway drive where I can do 120kph, followed by a longer part restricted to 80kpm, it is here that regeneration often starts. I have also noticed if I change down to 4th gear (2200rpm), regeneration finishes faster and is usually ready before I leave the motorway.
When I notice that regeneration is in progress I try and keep the revs above 2000rpm, In fact when driving home from work I have a short motorway drive where I can do 120kph, followed by a longer part restricted to 80kpm, it is here that regeneration often starts. I have also noticed if I change down to 4th gear (2200rpm), regeneration finishes faster and is usually ready before I leave the motorway.
DPF regeneration depends on how much "load" (i.e. fuel consumption) the engine normally works at. It does not depend on high/low rpm dirving habit. For example, in my experince: highway trips, 130-160 km/h, engine works at 2.200 - 2.600, 6th gear, average fuel consumption is 6-7 L/100KM, engine load is quite "serious" and DPF regeneration occurs every 290-300 km. Interstate roads trips, 70-90 km/h, 4th/5th gear, average fuel consumpion 4-5 L/100KM, engine load is mild and DPF regeneration occurs every 360-370 km. @gazbo: mazda's DPF regeneration system is an active one (not passive) and is based upon the exaust gases differential pressure mechanism (differential between exaust gas pressure "before" the DPF and "after" it): putting it simple, when the differential pressure exeeds a predetermined value, it means that DPF is "full" (due to the particles trapped in it, exaust gases come out from the DPF at a lesser speed than the one at which they enter it, and there are 2 sensors which constantly mesure these speeds) and then the engine control unit (ECU) forces the DPF regeneration, "cleaning" all the particles by turning them into CO2 by means of very high temperature and fuel (chemical reaction).
I'm not doing exact stats, but for me DPF regeneration is happening every 200km/h. I'm doing aggressive and city driving mostly. If you are usually driving on the highway and don't have the fuel monitor app on the screen always you might just miss it. However, since I'm driving in the city I always notice it:
- higher RPMs when idling
- instant higher fuel consumption that lasts specific period of time without changing the style of driving
- deeper exhaust noise (I wish I had that always)
- gas pedal acts a little bit differently (I wish I had that by default)
- the engine blue shadow is not shown in the fuel monitor app
- i-Stop doesn't work when turned on and the engine is not cold, and battery and A/C icons are with blue shadow
@owner: DPF definitely depends on the engine load (which translates into fuel consumption) as you said.
@Jukkeli that might be a good point there. I'll definitely try it and see the time it takes when holding up RPM around 3K, which is kind of hard when driving in the city. If you start giving it too much stress or just let it idle it will actually take a lot longer, even up to 30 minutes. My usual DPF regen takes about 10-15 minutes while driving in the city.
For everyone that's interested I'm just giving an example here: If you are accelerating from 0 to 60km/h as quick as possible by shifting from 1st to 4th gear before 2000rpm you are actually putting more load to the engine than driving 130km/h in 6th gear for the same time.
So in theory and statistically how often DPF regeneration will happen depends on your fuel consumption. Usually it happens once in 15-20 liters of fuel consumed, however it's not very precise and constant and the ECU actually tries to follow your driving style and starts up DPF regeneration when your driving style matches the ideal conditions to regenerate DPF - which might be just incorrect and you can change your driving style or you can even turn off the engine right when it starts. Then it will continue DPF regeneration instantly after you start the engine (if the temperature is above the minimum at a few sensors).
Simple stuff, huh. Not really. It happened to me that the car didn't want to start for about two hours because the exhaust got overdosed with fuel (just a wild guess). I was driving normally, DPF regeneration was started (I didn't notice it), then I started pushing the car to the limit (fuel consumption went a lot high over 20 l/100km), then drove about 5 mins normally (fuel consumption showing over 10 l/100km), and then just turned off the engine and went to the market. Car didn't want to start afterwards. I tried a few times only as I didn't want to kill the battery, but it might have started if I continued trying, however I just left it idling and then after about two hours it just worked. Why this happened is unclear and there were no error codes at all, but there might be a situation that is just not handled properly. I've intentionally tried the same scenario many times and didn't manage to break it again. No explanation from Mazda officials about it.
- higher RPMs when idling
- instant higher fuel consumption that lasts specific period of time without changing the style of driving
- deeper exhaust noise (I wish I had that always)
- gas pedal acts a little bit differently (I wish I had that by default)
- the engine blue shadow is not shown in the fuel monitor app
- i-Stop doesn't work when turned on and the engine is not cold, and battery and A/C icons are with blue shadow
@owner: DPF definitely depends on the engine load (which translates into fuel consumption) as you said.
@Jukkeli that might be a good point there. I'll definitely try it and see the time it takes when holding up RPM around 3K, which is kind of hard when driving in the city. If you start giving it too much stress or just let it idle it will actually take a lot longer, even up to 30 minutes. My usual DPF regen takes about 10-15 minutes while driving in the city.
For everyone that's interested I'm just giving an example here: If you are accelerating from 0 to 60km/h as quick as possible by shifting from 1st to 4th gear before 2000rpm you are actually putting more load to the engine than driving 130km/h in 6th gear for the same time.
So in theory and statistically how often DPF regeneration will happen depends on your fuel consumption. Usually it happens once in 15-20 liters of fuel consumed, however it's not very precise and constant and the ECU actually tries to follow your driving style and starts up DPF regeneration when your driving style matches the ideal conditions to regenerate DPF - which might be just incorrect and you can change your driving style or you can even turn off the engine right when it starts. Then it will continue DPF regeneration instantly after you start the engine (if the temperature is above the minimum at a few sensors).
Simple stuff, huh. Not really. It happened to me that the car didn't want to start for about two hours because the exhaust got overdosed with fuel (just a wild guess). I was driving normally, DPF regeneration was started (I didn't notice it), then I started pushing the car to the limit (fuel consumption went a lot high over 20 l/100km), then drove about 5 mins normally (fuel consumption showing over 10 l/100km), and then just turned off the engine and went to the market. Car didn't want to start afterwards. I tried a few times only as I didn't want to kill the battery, but it might have started if I continued trying, however I just left it idling and then after about two hours it just worked. Why this happened is unclear and there were no error codes at all, but there might be a situation that is just not handled properly. I've intentionally tried the same scenario many times and didn't manage to break it again. No explanation from Mazda officials about it.
Hi,
I can confirm that the 2.2 diesel does DPF regens more less every 250 kilometers.
I have a obdii reader and data from the computer gave me a total number of regens done so far. Compared to the total mileage done - it game me an average of 250 km more less.
The thing is, that I don't thing this car does passive regens. It seems it does active ones regardless of exhaust temperature. The obd scanner shows me that at around 140 km/h on 6th gear you easily reach 400 degrees celsius on highways, but it probably is not enough to burn the soot. I have driven my car even faster than that but if there were passive regens, they would not count to the total regens done, would they?
Anyway, regardless of your driving style, it seems that active regens are done every 250 km.
What I can also confirm is that if you give the car a good spin every now and then, the regen is unnoticeable. I have only noticed 1-2 regens in the city and only because istop was not functional.
I can confirm that the 2.2 diesel does DPF regens more less every 250 kilometers.
I have a obdii reader and data from the computer gave me a total number of regens done so far. Compared to the total mileage done - it game me an average of 250 km more less.
The thing is, that I don't thing this car does passive regens. It seems it does active ones regardless of exhaust temperature. The obd scanner shows me that at around 140 km/h on 6th gear you easily reach 400 degrees celsius on highways, but it probably is not enough to burn the soot. I have driven my car even faster than that but if there were passive regens, they would not count to the total regens done, would they?
Anyway, regardless of your driving style, it seems that active regens are done every 250 km.
What I can also confirm is that if you give the car a good spin every now and then, the regen is unnoticeable. I have only noticed 1-2 regens in the city and only because istop was not functional.
Here is my super advice tried out yesterday. If you notice dpf regen has started, keep the revs steady at around 2200-2500 rpms until it finishes. It took around 6 minutes for mine to finish from start until end (cruise control engaged).
I had a problem with a regen at around 3k rpms or more, when the engine speed was not steady and accelerating and braking. In fact, because of this the regen took much longer and decreased mpg significantly. On a negative note, I think this one increased oil level a bit.
I had a problem with a regen at around 3k rpms or more, when the engine speed was not steady and accelerating and braking. In fact, because of this the regen took much longer and decreased mpg significantly. On a negative note, I think this one increased oil level a bit.
hi,
Anyone with idea why mine Mazda 3 2.2 Skyactiv-D is regenerating DFP every 130-140 km. I'm driving mostly extra urban ~100 km/h.
Another thing I noticed is increased fuel consumption alongside (without regen happening)
90 km/h Cruise control - ~6L/100km
120 km/h Cruise control - ~8L/100km
So far I did replaced MAF, all filters, Vacuum Pump, and cleaned carbon from intake (all done by Mazda official service)
and I still get high fuel consumption and DPF regen in short periods.
Help is much appreciated. Thanks
Anyone with idea why mine Mazda 3 2.2 Skyactiv-D is regenerating DFP every 130-140 km. I'm driving mostly extra urban ~100 km/h.
Another thing I noticed is increased fuel consumption alongside (without regen happening)
90 km/h Cruise control - ~6L/100km
120 km/h Cruise control - ~8L/100km
So far I did replaced MAF, all filters, Vacuum Pump, and cleaned carbon from intake (all done by Mazda official service)
and I still get high fuel consumption and DPF regen in short periods.
Help is much appreciated. Thanks
Does anyone know (will share knowledge) about why DPF regen getting often and often.
Mine started at about every 140 km, and 6000 km later on, it is now regen every 80 km.
I've check around all and this is common problem, and there is a solution, but nobody said what it was. I found few posts over the internet that taking the car to Mazda service center sorted the problem, but they don't mention what was the solution.
I took mine to Mazda service center and they had no idea how to fix this and what is causing it
Please, if anyone had an idea what needs to be done, share the solution.
So far I did:
1. Forced long regeneration of DPF (performed by Mazda personnel)
2. Checked all Diesel fuel injectors (all worked fine)
3. Used several additives cleaning DPF ( DPF ware factor reported by Mazda software is about 7% - excellent)
none of the above worked.
Mine started at about every 140 km, and 6000 km later on, it is now regen every 80 km.
I've check around all and this is common problem, and there is a solution, but nobody said what it was. I found few posts over the internet that taking the car to Mazda service center sorted the problem, but they don't mention what was the solution.
I took mine to Mazda service center and they had no idea how to fix this and what is causing it
Please, if anyone had an idea what needs to be done, share the solution.
So far I did:
1. Forced long regeneration of DPF (performed by Mazda personnel)
2. Checked all Diesel fuel injectors (all worked fine)
3. Used several additives cleaning DPF ( DPF ware factor reported by Mazda software is about 7% - excellent)
none of the above worked.
Your route & traffic will affect regen cycles. If trips are short & slow, DPFs get clogged faster.
Proper periodic DPF cleaning requires removal. I doubt the dealership would've done this on yours...
The permanent solution would defeat its purpose & would be cruel to Momma Earth...DPF Can surgery w/o touching the CAT & ECU reprogram...No dealership will ever do this for you.
Sent from my SM-G970F using Tapatalk
Proper periodic DPF cleaning requires removal. I doubt the dealership would've done this on yours...
Sent from my SM-G970F using Tapatalk
Stuck EGR valve maybe.....if your engine oil level is rising you are getting fuel contamination in the crank case.
Well I am not sure about EGR valve because, I forgot to mention, my car has 52.000km (32.000 miles) on odometer...I will try to google it...
Any how, thank you for replay
Any how, thank you for replay
Well, it could be injectors leaking, but it could also be a problem with the DPF system. Too much fuel used during the regen process will result in excess fuel settling into the sump and contaminating the oil.
Mine's doing the same thing. Oil gets contaminated (rise to "x" mark) in about 3000km.
Regen happens every 80-100 km - this is one of the problems
Other problem is: while regenerating, instant fuel consumption "sky rocketing" - if I drive on highway at 120km/h and instant fuel consumptions is around 6 l/100km - regen starts and it jumps to 18-20 l/100km (for 20 min or 30 km). If I drive in the city while regen is in progress, then starting off a traffic lights get instant fuel consumption to 80 l/100km (RPM kept under 2500).
Can someone confirm what would be normal behavior on this conditions?
Regen happens every 80-100 km - this is one of the problems
Other problem is: while regenerating, instant fuel consumption "sky rocketing" - if I drive on highway at 120km/h and instant fuel consumptions is around 6 l/100km - regen starts and it jumps to 18-20 l/100km (for 20 min or 30 km). If I drive in the city while regen is in progress, then starting off a traffic lights get instant fuel consumption to 80 l/100km (RPM kept under 2500).
Can someone confirm what would be normal behavior on this conditions?
Thank you so much for the detailed story, Sasa Covic !
I'm glad that I'm not the one with this weird problem that none of Mazda official representatives can solve. It looks like you have exactly the same problem.
Please let me know what was the solution to this (if they solve the problem) so I can "copy-paste" that
Help is much appreciated !
I'm glad that I'm not the one with this weird problem that none of Mazda official representatives can solve. It looks like you have exactly the same problem.
Please let me know what was the solution to this (if they solve the problem) so I can "copy-paste" that
Help is much appreciated !
Jeeez maaan, exactly the same story here.
This is third time I went to Mazda dealer for diagnose, and no error codes, BUT they told me that it is probably bad injectors that I need to replace ~3100 Euro. So I asked them, if the regeneration is not fixed after that, will they return all my money back - answer: No . So Fck you Mazda, I'm not experimenting with 3000 Euro because you don't know what is the damn problem of your own stupid DPF solution.
I also had EGR checked and cleaned, replaced bunch of exhaust sensors - Pre DPF temp. sensor, Past DPF temp sensor, differential pressure sensor, MAP sensor, and oxygen sensor on the exhaust. None of which changed anything.
Then I bought a self diagnostic OBD2 tool, to monitor all sensors in Realtime, and try to figure out when DPF regen starts. So far, I have no clue, it appear completely random - i.e. Differential Pressure Sensor show fairly constant values all the time and yet DFP regen is triggered again. I have measured it after DPF regen finished, and all the way till next regen occurred - pretty similar results, so I guess it is not Diff.Pressure that trigger the damn regen.
Also, as I might already said, but brought the car for DPF machine cleaning, and they took the DPF and measured it before cleaning and it was in mint condition, so it is not DPF that is clogged - needless to say DPF cleaning not helped at all.
About the Injector "training" - Mazda is ding this every time (3 times so far) when I take the car to the service - this is basically "training" for the ECU to use each injector properly, like if some injectors blow up more fuel, then ECU will correct this by shutting down nozzle earlier, and so on. Anyway it does not help at all.
So far there is only one option left unexplored - to replace the damn injectors for Sht-Load of money and hope it solve the problem, but if not then...
@ Sasa , I'll keep you posted if I find anything interesting, so please you keep me updated if you find anytning.
Thanks !
This is third time I went to Mazda dealer for diagnose, and no error codes, BUT they told me that it is probably bad injectors that I need to replace ~3100 Euro. So I asked them, if the regeneration is not fixed after that, will they return all my money back - answer: No . So Fck you Mazda, I'm not experimenting with 3000 Euro because you don't know what is the damn problem of your own stupid DPF solution.
I also had EGR checked and cleaned, replaced bunch of exhaust sensors - Pre DPF temp. sensor, Past DPF temp sensor, differential pressure sensor, MAP sensor, and oxygen sensor on the exhaust. None of which changed anything.
Then I bought a self diagnostic OBD2 tool, to monitor all sensors in Realtime, and try to figure out when DPF regen starts. So far, I have no clue, it appear completely random - i.e. Differential Pressure Sensor show fairly constant values all the time and yet DFP regen is triggered again. I have measured it after DPF regen finished, and all the way till next regen occurred - pretty similar results, so I guess it is not Diff.Pressure that trigger the damn regen.
Also, as I might already said, but brought the car for DPF machine cleaning, and they took the DPF and measured it before cleaning and it was in mint condition, so it is not DPF that is clogged - needless to say DPF cleaning not helped at all.
About the Injector "training" - Mazda is ding this every time (3 times so far) when I take the car to the service - this is basically "training" for the ECU to use each injector properly, like if some injectors blow up more fuel, then ECU will correct this by shutting down nozzle earlier, and so on. Anyway it does not help at all.
So far there is only one option left unexplored - to replace the damn injectors for Sht-Load of money and hope it solve the problem, but if not then...
@ Sasa , I'll keep you posted if I find anything interesting, so please you keep me updated if you find anytning.
Thanks !
This is sounding more like a software issue with the ECU. Its a problem that is not at all unique to Mazda.
Aratol,
If Yonef changed everything ( except injectors ), it makes sense to me too that there is a 'software issue'. Also, there are same symptoms with 2,2 and 1,5 engines?!? And diesel engines they made have a oil dipstick marked with min, max and 'X' oil mark. So obviously they expected oil rise with a non 'ad-blue' DPF regeneration system.
Also, I would like to believe that car brand like Mazda, would have 'software update solution' for this problem.
But it is obviously, when they realized that there is a fckup with 'revolutionary skyactive diesel engine' - they gave up, stop diesel production and left the customers with a big problem... and trust me, there is a lot of 2014-2018 Mazda diesel car sold in Europe!!!
I really don't expect that engineers who participated in the development of this engine should perform 'hara-kiri', but some kind of solution would be fair.
At this point, even if you ( theoretically ) change complete engine with all components and electronics, official manufacturer cannot guarantee that problem will be solved.
So...let's set it simple:
my car do a lot of unnecessary DPF regeneration, making oil diluted with fuel and oil lever rising! How to stop unnecessary DPF regeneration? instead of 4-5 times per 200 km, just once?
If Yonef changed everything ( except injectors ), it makes sense to me too that there is a 'software issue'. Also, there are same symptoms with 2,2 and 1,5 engines?!? And diesel engines they made have a oil dipstick marked with min, max and 'X' oil mark. So obviously they expected oil rise with a non 'ad-blue' DPF regeneration system.
Also, I would like to believe that car brand like Mazda, would have 'software update solution' for this problem.
But it is obviously, when they realized that there is a fckup with 'revolutionary skyactive diesel engine' - they gave up, stop diesel production and left the customers with a big problem... and trust me, there is a lot of 2014-2018 Mazda diesel car sold in Europe!!!
I really don't expect that engineers who participated in the development of this engine should perform 'hara-kiri', but some kind of solution would be fair.
At this point, even if you ( theoretically ) change complete engine with all components and electronics, official manufacturer cannot guarantee that problem will be solved.
So...let's set it simple:
my car do a lot of unnecessary DPF regeneration, making oil diluted with fuel and oil lever rising! How to stop unnecessary DPF regeneration? instead of 4-5 times per 200 km, just once?
If you guys are using the less volatile bio-diesel (Fatty Acid Methyl Ester or FAME blend), skip it.
DPF equipped diesels were not built for incity driving. If such is the use, go for periodic long drives. DPFs can only properly operate(*correction: passive regen) at higher exhaust temps (600°C +)....One can't come near this w/ short & slow trips.
Sent from my SM-G970F using Tapatalk
DPF equipped diesels were not built for incity driving. If such is the use, go for periodic long drives. DPFs can only properly operate(*correction: passive regen) at higher exhaust temps (600°C +)....One can't come near this w/ short & slow trips.
Sent from my SM-G970F using Tapatalk
@ Sasa, and @minsanity.
Just got (again) to Mazda dealership where they performed "forced regen" - they started the regen process via software while car was cooled down with fans in Mazda service. It took 12 min. to complete (fairly short time) and measuring differential pressure of DPF before and after were very similar , as I said, my DPF is clean, and in "mint" condition according to Mazda personnel. So this does not helped at all, next regen was 72 km later on the highway.
I also forgot to mention that first time I brought the car to Mazda, first thing they do is complete re-flash of the ECU cause they thought I did a software chip-tunning which is causing often regens. Obviously they were wrong. This changed nothing. Also according to them, my ECU were updated with firmware of 2019 (latest ECU procedures) - my original software was from 2014. They said there are few differences (not related to DPF) but still worth updating.
What I did figured so far, is that DPF and EGR are in perfect condition, yet regens happen very often. The only experiment is I'm not willing to do is spending 3200 Euro for injectors to find out that this solves nothing. maybe if someone (from Mazda) can guarantee this will help, and if not return my money back - then I will try. I'm seriously considering DFP delete now - probably only solution to this nonsense.
How come Mazda personnel can't tell conditions that trigger DPF regen !? This is not serious, there should be known conditions that trigger ECU to start regen, how come nobody know that!?
I can only guarantee that this is NOT DPF Differential Pressure, as mine sits very low all the time.
Just got (again) to Mazda dealership where they performed "forced regen" - they started the regen process via software while car was cooled down with fans in Mazda service. It took 12 min. to complete (fairly short time) and measuring differential pressure of DPF before and after were very similar , as I said, my DPF is clean, and in "mint" condition according to Mazda personnel. So this does not helped at all, next regen was 72 km later on the highway.
I also forgot to mention that first time I brought the car to Mazda, first thing they do is complete re-flash of the ECU cause they thought I did a software chip-tunning which is causing often regens. Obviously they were wrong. This changed nothing. Also according to them, my ECU were updated with firmware of 2019 (latest ECU procedures) - my original software was from 2014. They said there are few differences (not related to DPF) but still worth updating.
What I did figured so far, is that DPF and EGR are in perfect condition, yet regens happen very often. The only experiment is I'm not willing to do is spending 3200 Euro for injectors to find out that this solves nothing. maybe if someone (from Mazda) can guarantee this will help, and if not return my money back - then I will try. I'm seriously considering DFP delete now - probably only solution to this nonsense.
How come Mazda personnel can't tell conditions that trigger DPF regen !? This is not serious, there should be known conditions that trigger ECU to start regen, how come nobody know that!?
I can only guarantee that this is NOT DPF Differential Pressure, as mine sits very low all the time.
This is how I see it - The regen system is working properly....that is its doing what the software is telling it to do according to whatever parameters are set. The problem is the software has bugs in it, and thats something the techs haven't got a clue about. They only know how to fix things according to the charts and procedures in the service manual. Outside that, they don't know any more than you about this. Best bet here is call Mazda Customer Service and escalate the claim. Mazda might need to send an engineer to see whats going on.
Aaaaaaand one more thing!
After all the facts that's been mentioned in previous posts, I still like to think that, despite the all sensors and electronics - the solution could be very simple ( I'm just thinking ) :
DPF pressure sensor is the part which sends wrong info and triggers the regeneration!
If we assume that the sensor is correct and DPF is clean - maybe there is problem somewhere in between of these two parts?
As far as I understand sensor gets information from DPF with 2 hoses? What if one of crappy rubber hoses is slightly cracked or slightly clogged, just enough to send lover pressure info to the sensor? And then, sensor does what it suppose to do - it assumes that DPF is 'filthy' and informs ECU about this! After this, ECU send command to start regeneration and this vicious circle never ends and it is constantly repeated?
Please excuse me for this childish explanation, but I'm very obsessed with this problem, and every spare time I have - I spend it trying to find some logic solution for this problem.
So I am sorry to bother you all.
After all the facts that's been mentioned in previous posts, I still like to think that, despite the all sensors and electronics - the solution could be very simple ( I'm just thinking ) :
DPF pressure sensor is the part which sends wrong info and triggers the regeneration!
If we assume that the sensor is correct and DPF is clean - maybe there is problem somewhere in between of these two parts?
As far as I understand sensor gets information from DPF with 2 hoses? What if one of crappy rubber hoses is slightly cracked or slightly clogged, just enough to send lover pressure info to the sensor? And then, sensor does what it suppose to do - it assumes that DPF is 'filthy' and informs ECU about this! After this, ECU send command to start regeneration and this vicious circle never ends and it is constantly repeated?
Please excuse me for this childish explanation, but I'm very obsessed with this problem, and every spare time I have - I spend it trying to find some logic solution for this problem.
So I am sorry to bother you all.
You're in the right forum. Just very few have diesels or have chosen them here. Feel free to share & rant, sir.
The way I see it? It's somewhere between the ECU & DPF. And, if those techs should suspect injectors for whatever reason, they should've given cleaning a crack....What will cleaning or new injectors do? Inject better & even more fuel during active regens to dilute oil further?[emoji848]
iStop & DPF are reasons why I opted for Skyactivs w/o them. I genuinely hope this huntdown will end happily.[emoji120] Do keep us posted.
Sent from my SM-G970F using Tapatalk
Yonef my friend...
When I started to read your last post, I thought that you have solution finally!!!
But the more I read it, the more confused I am...
I really don't understand how ECU can start regen without any sensors info...
For me, this fact is no logic. And as I already wrote, there is no logic to blame injectors for often regeneration!!!
''ECU thinks it need to increase exhaust temp. by adding more fuel, but adding more fuel makes it fuel-rich mixture, which creates more smoke, But more smoke is detected by ECU (regardless DPF is not clogged yet) and commands to start DPF regen before it got clogged''
The ECU should do this only in case that some sensor send specific readings, it shouldn't act like that ...I don't know...my head is going to blow
If guys from the shop are doing remapping's - do they have some option to remap ECU in order to work fine?
''meanwhile, I did 3200km and my oil need to go down the drain as it reached "x" mark on the dipstick (because it did 40 regens already)''
Meanwhile, after 900km since last oil change, my oil level is rising too...and I don't understand when they change the oil - why they pour it to the max level?
User manual quote: The level is normal if it is between the MIN and MAX marks
This is first vehicle that I own, and first official service I use, that pour oil to the max level! So far I never had this case in my driving experience...
So - next oil change, I wont do at official service, and the level is going between the MIN and MAX marks.
When I started to read your last post, I thought that you have solution finally!!!
But the more I read it, the more confused I am...
I really don't understand how ECU can start regen without any sensors info...
For me, this fact is no logic. And as I already wrote, there is no logic to blame injectors for often regeneration!!!
''ECU thinks it need to increase exhaust temp. by adding more fuel, but adding more fuel makes it fuel-rich mixture, which creates more smoke, But more smoke is detected by ECU (regardless DPF is not clogged yet) and commands to start DPF regen before it got clogged''
The ECU should do this only in case that some sensor send specific readings, it shouldn't act like that ...I don't know...my head is going to blow
If guys from the shop are doing remapping's - do they have some option to remap ECU in order to work fine?
''meanwhile, I did 3200km and my oil need to go down the drain as it reached "x" mark on the dipstick (because it did 40 regens already)''
Meanwhile, after 900km since last oil change, my oil level is rising too...and I don't understand when they change the oil - why they pour it to the max level?
User manual quote: The level is normal if it is between the MIN and MAX marks
This is first vehicle that I own, and first official service I use, that pour oil to the max level! So far I never had this case in my driving experience...
So - next oil change, I wont do at official service, and the level is going between the MIN and MAX marks.
Hey Sasa,
Most of the things going on with ECU is out of my understanding as well, but I don't want to temper ECU and risk remapping it to cause some other problem, as it seems the guys from the shop are not very sure why ECU acts like it does and increase fuel rate regardless of all sensors readings are normal.
What I'm thinking is get rid of DPF completely and delete it from ECU. In Bulgaria this is not very legal, but there is no enforcement doing it, and I also don't go abroad with this car, so I guess I will drive it in here only.
Other thing to say: it is just a RIDICULOUS DPF regen system by mazda, never seen more stupid solution than this
Most of the things going on with ECU is out of my understanding as well, but I don't want to temper ECU and risk remapping it to cause some other problem, as it seems the guys from the shop are not very sure why ECU acts like it does and increase fuel rate regardless of all sensors readings are normal.
What I'm thinking is get rid of DPF completely and delete it from ECU. In Bulgaria this is not very legal, but there is no enforcement doing it, and I also don't go abroad with this car, so I guess I will drive it in here only.
Other thing to say: it is just a RIDICULOUS DPF regen system by mazda, never seen more stupid solution than this
Sasa, please keep me posted with any development on this when you see this guy, and what will be outcome of this.
Thank you so much!
Thank you so much!
This is a great news Sasa.
I was almost sure that injecectors are at fault, but didn’t come across anybody who actually replaced them and shared the word with others so fair play to you mate.
If you could put me towards the company you have got your injectors from I will definitely give them a go.
I was almost sure that injecectors are at fault, but didn’t come across anybody who actually replaced them and shared the word with others so fair play to you mate.
If you could put me towards the company you have got your injectors from I will definitely give them a go.
So…. I have ordered set of injectors from magengines on Friday night. Have just fitted them and took my car for test drive. BOOM distance between regenerations went from 20 to 50 and after avg consumption dropped from 7.1 to 5.4
It has to be faulty injectors, but I am quite at shock as my car has only 35000kms
It has to be faulty injectors, but I am quite at shock as my car has only 35000kms
Heres an idea - If you still have the original set of injectors, send them off to be evaluated. That might tell you why they stopped working. The real issue may not be the injectors at all, but something else that is causing the injectors to fail prematurely.
Hey Sasa,
Glad you did fixed it. I still haven't ordered injectors, I'm trying to find some locally and test them, but if not, I'll order some from the site you proposed.
Just wondering what is happened with your 'old' injectors, did you have them tested to confirm it was a faulty injector, and if possible, can you specify what was wrong with them - i.e dispersers were bad and fuel not fine sprayed? or Solenoids were bad causing injectors to spray more fuel than needed?
Also with 'new' injectors, if you have motorway drive, can you lookup how much distance you cover between regens on a motorway?
Thanks again for the update man!
Glad you did fixed it. I still haven't ordered injectors, I'm trying to find some locally and test them, but if not, I'll order some from the site you proposed.
Just wondering what is happened with your 'old' injectors, did you have them tested to confirm it was a faulty injector, and if possible, can you specify what was wrong with them - i.e dispersers were bad and fuel not fine sprayed? or Solenoids were bad causing injectors to spray more fuel than needed?
Also with 'new' injectors, if you have motorway drive, can you lookup how much distance you cover between regens on a motorway?
Thanks again for the update man!
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
