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    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 1 Stunde schrieb Artur:

    Nope. For the system it's still working. It doesn't know the sensor is lying. There seems to be no plausibility check.

     

    Faulty sensor doesnt make sense to me,  then engine would be smoking all of the time if computer it thinks engine is to cold, to rich mixture and it does not, only at engine start it smokes.

    Anyway I just to a look and swapped it with another working sensor (how do they manage to put that thing where it sits....so little working space like I said hate working on this engine)...
    but no result like I thought so...and broke the electric connector on top...now hopefully it still connects properly...

    I notice after some time smoke gets less...so like McFly my diagnosis are faulty PDE, fuel is accumulating in the engine, and that I aint gonna fix...

    Still thing I find little bit strange that when I give a little gas it smokes heavily, at idle less...but that is probably due to the fact that it injects more fuel at higher rev and together with the fuel already in the engine its much more fuel...or?

     

    Many thanks you all...(now can I still ask other things in English if i want to...:-))

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 9 Stunden schrieb Artur:

    It's a double temperature sensor. One for the dashboard and the other one for the engine control unit. The latter is the important one and delivers wrong numbers maybe. So you have to check.

     

    I know , 1 housing with 2 sensor,  G2/G62.

    And G83....but u dont mean this one i guess.

    i can swap it and give it a try...

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 25 Minuten schrieb McFly:

    I don't get it. So what's your question then? You don't like like the smoke, but you also don't want to do anything about it... :kratz:

     

    Now u assume it's thé PDE for sure, that's not the case yet and if So to much work...but somehow you're also right, but i don't like working on this car nomore except for small repairs

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 7 Minuten schrieb McFly:

    So it is only a puff of smoke after startup? Like after a few seconds it's back to normal? That would indicate that either oil or fuel is accumulating in the engine while parked. That's typically leaking PDEs or some oil from leaking valve stem seals. I'd figure PDEs are more likely. If it would be white smoke it could also be coolant. Your coolant is clear and free of oil I assume w/o any loss?

     

    But, if you don't want to investigate and fix it you'll have to live with it. 

     

    Yeah like i said....and that is a pain in thé ass...

     

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math
    And i dont

    vor 21 Minuten schrieb McFly:

    At cold start: Black smoke, grey smoke, or white smoke?

    The splatter is very likely due to only short operation intervalls accumulating condensate in the exhaust mixed with grime. Grime is always there, if it becomes worrisome you could think about a leaking exhaust return valve. Something, that reduces oxygen while still maintaining manifold pressure. Or PDEs that are wearing out due to age, i.e. that don't spray as fine as they used to do.

    Smoke Mixture of all...

    Yeah all can be so true, i don't plan however on checking or replacement PDE.

    Oh u Mean leaking EGR valve? Thought exhaust valve.

    My guess would be to rich Mixture...due to leaking injectors but that also a wild guess

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 4 Minuten schrieb Romulus:

    Read the reported engine temperature at cold start and compare with the outside temperature. Should be fairly close to each other. If not, change the green temperature sensor:

     

     

    Crossed my mind can give it a try, thanks, i have one from 1.9 TDI in my garage

    How Read the reported engine temperature at cold start ? OBD?

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 19 Minuten schrieb Romulus:

    Good that you are on speaking terms with us again. We are a very helpful bunch of enthousiastics, but the answers we can give are as good as the information we get.

     

    We are talking about an AMF engine, not BHC engine, right?

    How much did the car drive until now (km-stand)?

    What do you know about service history?

    How old are the fuel filter and air filter?

    How old are the unit injectors? Were they ever replaced?

    How old is the turbo? Has it ever been replaced?

    Is the timing of the engine all right?

    Does it consume notable amounts of oil?

    Are there any DTC, failure codes to be read using OBDII?

     

    Do you drive short or long distances? Is the effect depending on how you used the car before?

     

    AMF

    206 tons

    Service history almost nothing exept things i did myself

    New airfilter fuel filter no

    Injectors, turbo no info

    Changed timing belt last year

    No oil consumption

    No DTC codes

    Zitat

     

     

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 15 Minuten schrieb McFly:

    So it is still the Nov 19th Problem at engine start? Just the splatter on the ground, or visible smoke behind the car? No more of this once it's running for a little while?

     

    Both splatter and visible smoke af engine start, seems thé lower outside temperature, thé more.

    When engine hot, nomore.

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    bret, what info?

    I dont get it why this engine smokes heavily at cold start....I wonder if all 3 cyl.  1.4 TDI have this behaviour?

    I dont know nothing concerning history PD, Turbo etc. 

    I dont know of any vacuum leaks or bad components....changed filters etc. No specific error codes....no MIL light..nothing just black smoke whit little higher rev....  

    For the rest no problems, runs just fine....(though I think I noticed some change when disconnecting Air Mass Meter, but probably im seeing ghosts)

    Im kind a enviroment freak and this is quite annoying..i already told im looking for other car, but this diesel affair makes thing hopeless to sell...

    (now they probably tell me to go to English forum..:D)

     

    Nochmals, tut mir leid aber schwarzer Rauch beim Kaltstart

    in Technik

    Geschrieben · Bearbeitet von Math

    vor 3 Minuten schrieb morgoth:

    Vorstand:

    Moment, hier diskriminiert niemand irgendwen. Das Thema ist in der Technikecke, da wird alles was nichts mit dem Thema zu tun hat gelöscht.

    Wir haben auch einen Englischsprachigen Bereich, alternativ können evtl. die Kollegen im Holländischen A2 Forum helfen.

     

    Was meint de dann mit ¨...Wutausbrüche sind hier ebenso fehl am Platz, dazu bitte in die Plauderecke gehen.¨ wie nennt man das den, Technik??

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