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Skoda Octavia 3 1.4 TSI: Analyzing Ignition Misfires and their Frequency at Various RPMs

Brooklyn23 12699 12
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 16900096
    Brooklyn23
    Level 7  
    Hello,
    I have a question for those who know electromechanics. A friend connected the computer to my car (Octavia 3 1.4 TSI). They did not save any errors. Blank screen.
    However, it entered the option of falling out of ignition and it looks like this:
    With a turnover of up to 2,000 there is no loss of ignition.
    With a turnover of 3 to 4 thousand. there is a single (from 1 to max 5) misfire. The most fell out on the 3rd cylinder.
    At the area of rotation 4 thousand ignitions fall out more often. On the second cylinder it was about 30-40 to spontaneously delete.

    In general, we entered the historical "ignition breaks" and counted there as many as 19,000. breaks ("prolapses" :) ) on cylinder 1 and 2. Out of 3 approx. 16 thousand On the fourth approx. 11 thousand It is not known since when it counts, but I suspect that this data from the beginning of the car, but something quite a lot of them and it is not known whether they appeared from the beginning of the car or only recently.

    And my questions are:
    1. Is it normal for the ignition to fall out at 4-5 thousand revolutions? From a few to several in a half minute?
    2. Do other cars show that the ignition count data (historical) also show such large numbers (about 19,000), or is it something wrong with me? Given that the car is 4 years old, should these numbers not be paid attention to in thousands, or look for a reason?
    3. Any ideas what to do about it? Do you ride and disregard?

    Nothing happens to the car, it doesn't tug, it fires well, the check engine light is off. Candles changed to new ones.
    Thanks in advance for the info
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  • #2 16900341
    DriverMSG
    Admin of Computers group
    Too many factors converge on counting these falling out ignitions to clearly determine their source.
    You should check almost everything in the engine starting from:
    Cylinder pressure, coils and spark plugs, ECU, fuel injection system, sensors, filters etc.
  • #3 16900359
    arigato
    Level 28  
    This phenomenon may primarily apply to systems powered by LPG. Other (more demanding) operating conditions of the ignition system cause accelerated wear of the ignition system circuits. For example, the loss of insulation of supply cables spark!
    Personally, I would start with wires. The candles have already been replaced so there is no problem. If a colleague powers the LPG engine, it is very possible that cables are fed up with ...
    There may also be problems with the crankshaft position sensor (incorrect interpretation, but not only), which also ends in incorrect (chaotic) operation of the ignition system.
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  • #4 16900360
    DriverMSG
    Admin of Computers group
    arigato wrote:
    For example, the loss of insulation of supply cables spark!
    Personally, I would start with wires
    What cables are we talking about? There are no high voltage wires in this car - each candle has its own coil.
    arigato wrote:
    The candles have already been replaced so there is no problem.
    Just because listed doesn't mean that it works.
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  • #5 16900368
    arigato
    Level 28  
    I approached the matter clumsily. There are no wires in my lemon either. Man is stale in these old systems, habits and the world is not waiting ...
    However, as for these candles I would not exaggerate. Presentation of such a low faith is unlikely to suit the esteemed DriverMSG
    Admin group computers :D
    Following the same path - the fact that listed does not mean that it is inefficient :D
    We're not buying it so that it doesn't work, right? I think these candles, however, work as it should and that's it.
    Let's say that we exclude these high-voltage circuits, however this WK position detector should be checked.
  • #6 16900375
    DriverMSG
    Admin of Computers group
    arigato wrote:
    I think these candles, however, work as it should and that's it.
    This, as well as coils, the author can verify by replacing them with places.
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  • #7 16900407
    Ireneo
    Level 42  
    Replace coil candles with places.
  • #8 16900536
    Brooklyn23
    Level 7  
    I clarify: - I don't have LPG, I have 1.4 TSI gasoline,
    - candles have no effect on this, I checked before replacing with old and new ones, both are similar,
    - coils probably can be omitted. Rather, they do not affect it, because depending on the connection to the computer, once it comes out on the 3rd cylinder the weakest, other time on the 2nd, and yet another on 1. If it probably already needs to be replaced with all new ones, but rather not all at once .
    - WK sensor - not yet tested. Fact.

    Generally, the ASO claims that everything is OK and keep going. I don't know if they have ever seen the number of breaks recorded in the measurement history. They probably went like in szymelku, i.e. the error doesn't crash - it's OK. Well, I'm just wondering whether to go into costs and check everything in order (the car probably won't leave the workshop, because from what you write to check is almost everything), or not really worry and go further.
    And maybe someone connected your car and checked the number of ignition breaks on individual cylinders from the beginning of the story? How much do you have on the clock? Because there is certainly even a properly functioning engine with a ignition spit.
  • #9 16900849
    DriverMSG
    Admin of Computers group
    Brooklyn23 wrote:
    coils probably can be omitted. Rather, they do not affect it, because depending on the connection to the computer, once it goes out on the 3rd cylinder the weakest, other times on the 2nd, and yet on 1.
    Swap the fourth with the third and check, these are not great costs.
    Such loss of ignition can even be due to the fault of moisture.
    Recently I tested a VW Polo with a similar engine and "it didn't work out", I don't think that is normal. You can certainly ride like this, but the disgust of ignorance will remain. :)
  • #10 16902548
    CAR pass
    Level 20  
    Out of curiosity I will ask (yes oh) and in which block in real values is the number of thousands of ignition fires on a given cylinder?
    What did you diagnose? VAS and VCDS do not show recorded numbers of falls at speeds above idle. When it switches from idle (idle), the misfires are not counted by the controller.
  • #11 16902680
    Brooklyn23
    Level 7  
    CAR pass wrote:
    Out of curiosity I will ask (yes oh) and in which block in real values is the number of thousands of ignition fires on a given cylinder?
    What did you diagnose? VAS and VCDS do not show recorded numbers of falls at speeds above idle. When it switches from idle (idle), the misfires are not counted by the controller.


    Well I'm not fluent in it, because it was an electro mechanic who did it.
    As for the first question, I don't know the answer. I just looked so that he entered something like the search engine "Loss of ignition", the menu opened and entered and there were 4 windows with temporary loss and 4 with the information something - "total number of ignition losses". If something appeared in the momentary, then it added to this large number, e.g. in the momentary it appeared 30, after zeroing it was done at the bottom of 19350 - 19380.
    I translate as in Leroy Merlin - something like that :)

    But the second question I know the answer (I think): 100% VCDS computer. Hmm ... and we checked at idle at 1 thousand, 2 thousand, and above 3-4 thousand and at 1 turnover it didn't count, right. At 2 thousand appeared sporadically, from 1 to 4 breaks, at 3 and 4 thousand. RPM popped up on various cylinders from 1 to max. 40, then it was deleted and counted again.

    Was he doing something wrong? How's the lamer? Maybe everything is OK with my car and I needlessly wreaked panic on the mechanior.
    I will be very grateful for the info.

    Gentlemen, is it safe to drive with the ignition? Will there eventually be any damage from this?
  • #12 16902940
    CAR pass
    Level 20  
    So, even if you have a random drop defined for a given cylinder, start by changing the oil and pour Engine Flush from a well-known company before changing it. These engineers can say they are sensitive to oil quality. When choosing an oil, if it is under warranty then you cannot decide but if the guarantee is not there, watch You..be (what not to do ads) what oils now have properties. I am talking about viscosity, among others. 3/4 on the market is suitable for fence maintenance.
    I have VCDS, VAS and VCP for the Vag group. Or maybe something has changed in the version from 17.8? In group 14 you have an abacus. In group 15, you have 3 cylinders and the information about the idling counting in group 16, 4 cylinders remain. A slight acceleration on the accelerator above 1000 revs turns Enabled on Di and that's it, ask the Lord in what group is the total counting?

    Added after 19 [minutes]:

    I forgot that Skoda is already on UDS
    command IDE01975 to IDE01978 cylinders 1 to 4
    and the sum of IDE01773
  • #13 16903508
    Brooklyn23
    Level 7  
    I call the Skoda Dealership to ask if this is normal in these engines. There, the service consultant says that they are not testing on VCDS and these are old computers and may indicate errors that are not on their authorized interfaces.
    Second ASO - this can be nothing to worry about ....
    And the third ASO - it's abnormal, you can't drive like this because it will spill whole. We invite you to us for diagnostics ?
    Oh, yo, yo ... Everyone is saying something different

Topic summary

The discussion revolves around ignition misfires in a Skoda Octavia 3 1.4 TSI, particularly noting the frequency of misfires at various RPMs. The user reports no error codes from diagnostics but observes significant historical ignition losses, especially on cylinders 1 and 2. Responses suggest checking multiple components, including cylinder pressure, ignition coils, spark plugs, and the crankshaft position sensor. Some participants mention the potential impact of moisture and the importance of oil quality. The user clarifies that the vehicle runs on gasoline, not LPG, and expresses uncertainty about the necessity of extensive diagnostics given conflicting opinions from different service centers.
Summary generated by the language model.
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