D-CAT white/blue smoke

Diskutiere D-CAT white/blue smoke im T25: Motorisierung Forum im Bereich Avensis T25: von 04-2003 bis 12-2008; Hi forum I have tried english forums without luck, so i will try this one. Long story short my 2007 avensis d-cat (273000 km) is smoking when its...

  1. #1 Zengine, 17.03.2021
    Zengine

    Zengine Neuling

    Dabei seit:
    03.12.2020
    Hi forum

    I have tried english forums without luck, so i will try this one. Long story short my 2007 avensis d-cat (273000 km) is smoking when its reaching its operating temperature in both city driving and motorway. Following has been done to the car within the last 15000 km.
    - new headgasket
    - 2 new main injectors
    - dpf cleaned (removed and send to professional dpf cleaning company
    - both temperature sensors inside dpf have been replaced with new ones
    - new original 5th injector and cleaning of the injector housing/channel
    - egr and intake manifold cleaned

    The car is not consuming any oil or coolant.

    The only time the car isnt smoking is when im driving on the motorway with 120 km/h with around 2000 rpm.

    Ive tried 2-3 mechanics who arent sure what the cause is. Some say turbo some say injectors. Im thinking sensor, connector or wiring issues. Ive collected some data with techstream and I was thinking maybe a friendly soul would have a look at them and maybe tell me if something looks completely wrong. I would be very thankful.
     

    Anhänge:

  2. #2 AndréSO, 18.03.2021
    AndréSO

    AndréSO Routinier

    Dabei seit:
    20.11.2018
    Ort:
    Soest
    Fahrzeug:
    Avensis Kombi T25 2,2D-CAT
    Hello Zengine,
    your files are simply unreadable. They are csv-files, so the datas are a mess on the screen.
    Please send screenshots or the original TSE files, so i can import them into my techstream.
    What could be wrong with your car?
    1. clogged differential pressure measure tubes.
    2. defect gascets on the original injectors
    3. defect turbo charger or clogged or blocked vtg mechanism
    4. defect sensors
    5. clogged throttle
    At least item 3 to 6 can be easily ruled out with a test ride protocolled with techstream.
    sinc André
     
  3. #3 Zengine, 19.03.2021
    Zengine

    Zengine Neuling

    Dabei seit:
    03.12.2020
    Hi André

    Im sorry but I couldnt upload excel or csv files. This forum site only allowed txt files so i converted them to txt in excel. I have zipped 2 excel files and 2 TSE files, I hope you can open them. If not I can send them to your mail.

    Regarding item 1 - The DPF was taken of the car and sent to a DPF cleaning company 2 months ago, I thought they would clean the differential pressure measure tubes too but im not sure if they have cleaned them.

    Regarding iten 2 - Injector 2 and 4 was changed when the headgasket was replaced. Im pretty sure the injector gaskets for all 4 injectors were replaced too. Its only 15000 km ago.

    Regarding item 3 - The mechanic who replaced the headgasket and injector 2 and 4 told me that if he changed the turbo the smoke could stop.

    Regarding item 4 - When the DPF was sent to cleaning, the mechanic also changed temperature sensor 1 and 2 inside the DPF. The lambda sensor, MAF sensor and MAP sensor have not been changed.

    If you need better data I can connect the car to techstream and do the test ride protocol. How do I perform the test ride protocol?

    And once again im very thankful for your interest and help André
     

    Anhänge:

  4. #4 Zengine, 19.03.2021
    Zengine

    Zengine Neuling

    Dabei seit:
    03.12.2020
    Looks like there has been a modification on the car back in 2014. Also today I discovered this fat white wire in the fuse box. Does anyone have a clue of what it could be? IMG_7002.JPG IMG_6998.JPG
     
  5. #5 AndréSO, 20.03.2021
    AndréSO

    AndréSO Routinier

    Dabei seit:
    20.11.2018
    Ort:
    Soest
    Fahrzeug:
    Avensis Kombi T25 2,2D-CAT
    Hello Zengine,
    the white wire is just part of the normal harness.
    The modifikation could be a upgrade of the ECU Software.
    I was now able to collect and analyze your datas.
    First the LMM should be OK. A max of MAF of 150gm/s shows it´s not worn out.
    The EGR and choke should be OK as well.
    The comparison of Target Common Rail Pressure and fuel pressure also show OK.
    But the comparison of MAP and Target Booster Pressure shows some time delay. The turbo charger some times comes to late and some times descends to late.
    Although the max MAP is OK, so the charger itself is OK, but the VTG could be clogged.
    Unfortunately your engine is completed again. The absense of the DPF would give you a easy chance to get acces to the VTG.
    Another thing is your AF Lambda B1S1. It should be close to 1, but yours is not. So there could be trouble with the catalysator or the lamda sensor.
    If you try another test ride reduce the recording time to 30s. Otherwise the time resolution is to poor to watch these effects.
    Then you record a steady drive, a power boost, and a decline. This should give some more information.
    sinc André
     
  6. #6 Zengine, 24.03.2021
    Zengine

    Zengine Neuling

    Dabei seit:
    03.12.2020
    Hello André

    Thank you for your observations. I did what you said and did some more test rides. I took:

    3 steady drives:
    1 x steady drive with 1600 rpm
    1 x steady drive with 2000 rpm
    1 x steady drive with 2500 rpm

    3 steady drive with powerboost and decline:
    1 x from 1600 rpm
    1 x from 2000 rpm
    1 x from 2500 rpm

    4 measurings with no vehicle speed at parking:
    1 x with 800 rpm
    1 x with 1600 rpm
    1 x with 2000 rpm
    1 x with 2500 rpm

    The AF Lambda B1S1 values are generally lower this time, but it could worn and contaminated from coolant from when I had the headgasket problem.

    Thank you once again, im very grateful
     

    Anhänge:

  7. #7 AndréSO, 31.03.2021
    AndréSO

    AndréSO Routinier

    Dabei seit:
    20.11.2018
    Ort:
    Soest
    Fahrzeug:
    Avensis Kombi T25 2,2D-CAT
    Hello Zengine,
    now i had the time to analyze your new data.
    My conclusion is, that there are a few awkward items.
    The main thing is the comparison of MAP and target booster pressure.
    The VTG is obviosly to slow. So it should be cleaned. Unfortunately it´s difficult to reach the VTG without removing the DPF.
    The maximum MAP is OK. So the charger itself should be OK.
    But you could reach the outer mechanism with a long flat pliers. Further on you can lubricate the plunger at the housing of the charger.
    The additional injection correction is too high. So it can be, that the injection channel of the 5th injector isn´t really free. Are the right gaskets in place?
    Last but not least your lamda values are much to high. So you can have a issue with your lamda sensor.
    A general recommandation from my experience with these engines is to ad 2-stroke engine oil to the fuel.
    This oil has to be 100% synthetic. I use Addinol MZ 406 in relationship 1:200 to the fuel.
    It helps the engine a lot to get rid of all kind of deposit in the fuel system caused by the usual bio mixed fuel.
    Additional you can use fuel additives to cleanup the fuel system, e.g. LM diesel engine cleaner.
    Good luck
    sinc André
     
  8. #8 Zengine, 01.04.2021
    Zengine

    Zengine Neuling

    Dabei seit:
    03.12.2020
    Hi André

    Thank you once again for your time, analyze and suggestions. I appreicate your help. I will look into these areas and hopefully I will have a solution to this issue. Regarding the 2 stroke oil. I´ve read in many forums that they use low ash jaso fb 2 stroke oil also in cars with dpf beacuse mineral oil has better burn properties and will not leave deposit.
     
  9. #9 mk5808775, 02.04.2021
    mk5808775

    mk5808775 Kaiser

    Dabei seit:
    16.10.2003
    Fahrzeug:
    T25 Exe, D4D 85kW, EZ 11/2003 & Yaris Hybird Team D, EZ 12/2017
    Verbrauch:
    Hi Zengine,
    just a wild guess, but have you ever had the glow plugs checked?
    I don't own a D-CAT T25, but I've had to replace the glow plugs on my 2003 T25 D4D twice.
    One symptom of one - or even more - failed glow plugs was trailing white smoke, your case seems more severe though.
    Best of luck!
     
  10. #10 Zengine, 03.04.2021
    Zengine

    Zengine Neuling

    Dabei seit:
    03.12.2020
    HI MK

    It could be but wouldn’t failing glow plugs result in smoke at cold start and warm phase? I have smoke during warm up and afterwards when the engine is warm. When I unplug and plug back the “efi main 2” fuse than I have no real smoke for a couple of days. Before I unplug the fuse my Exhaust Fuel Addition FB value is 1,45 and after I plug it in it’s 1. When I get smoke after a couple of days the value is again higher than 1.

    By the way thank you for your advice
     
  11. #11 AndréSO, 04.04.2021
    AndréSO

    AndréSO Routinier

    Dabei seit:
    20.11.2018
    Ort:
    Soest
    Fahrzeug:
    Avensis Kombi T25 2,2D-CAT
    That could be a hint that the channel for the 5th injector isn´t free or the injector is worse.
    Ther are a lot of fake injectors on the market.
     
  12. #12 mk5808775, 05.04.2021
    mk5808775

    mk5808775 Kaiser

    Dabei seit:
    16.10.2003
    Fahrzeug:
    T25 Exe, D4D 85kW, EZ 11/2003 & Yaris Hybird Team D, EZ 12/2017
    Verbrauch:
    Yeah, you're correct, it can't be the glow plugs when the engine is warm.
    On my car I've done excessive urban driving for the last couple of years, so it never heated up enough.
     
Thema:

D-CAT white/blue smoke