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BMW e46 318i VANOS: Cylinder 1 Misfire, 274E & 2742 Error Codes - Solutions & Tips Needed

Costamsie 31947 15
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  • #1 17545163
    Costamsie
    Level 6  
    Hello. I have a problem with bmw as in the subject.
    The computer shows two errors
    274E - Misfire Identification Total Case Error
    2742 - Misfire Cylinder 1

    I checked everything (I think), checked the pressure (10 bar on each), bought a new coil, replaced the candles, postponed the injection, checked the spark (at low and high revs). It didn't work and I have no ideas anymore. Maybe someone had such a case and knows what to do?
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  • #2 17545354
    MANTA20E
    Level 16  
    Hello
    10 bar (kg / cm2) on the pots is a bit too little ... for this engine
    Can you describe with what instrument and how you measured the compression pressure in the cylinders ...
    That could explain a lot ...
  • #3 17545806
    Costamsie
    Level 6  
    Buddy with a pressure gauge screwed in in place of candles
  • #4 17551066
    MANTA20E
    Level 16  
    Hello

    From what you wrote in the first post, I conclude that your car has the N42B18 engine.
    If one is there, judging by the faults described, you have a problem with the electric valve timing adjuster and related elements. (I attach a drawing showing this device) BMW e46 318i VANOS: Cylinder 1 Misfire, 274E & 2742 Error Codes - Solutions & Tips Needed

    Generally, it's a first-class mine ... it crashes on average after a mileage of more than 200,000 km.

    Replacing coils, candles, sensors, complete timing gear and other rings won't help.
    Driving into this engine with used timing inverter burrs is also pointless.

    Hardly anyone tries to do it, and if you find someone who knows exactly what's going on and will undertake this repair, the costs may be uninteresting ...

    As for the compression pressure in this engine, if everything is OK in it. it should be at least 13 kg / cm2 on a cold engine on the so-called "oil-free".
    If it is not, it means that the valve timing adjuster is malfunctioning and slightly opens the valves, so you have 10 kg / cm2 and not at least 13 kg / cm2.

    As for computer read errors:
    this only confirms the lack of synchronization of the pulse reading between the camshafts and the crankshaft.

    I wonder why in your case none of the forum members has spoken for 3 days .......

    greetings
  • #5 17551127
    Strumien swiadomosci swia
    Level 43  
    MANTA20E wrote:
    I wonder why in your case none of the forum members has spoken for 3 days .......

    Because.
    MANTA20E wrote:
    if you find someone who knows exactly what is going on and will undertake the repair, the costs may be uninteresting ...


    Buying a valvertonik is stupid without comment. Sooner or later you have to break the piggy bank for repair.
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  • #6 17551194
    MANTA20E
    Level 16  
    Strumien swiadomosci swia wrote:
    MANTA20E wrote:
    I wonder why in your case none of the forum members has spoken for 3 days .......

    Because.
    MANTA20E wrote:
    if you find someone who knows exactly what is going on and will undertake the repair, the costs may be uninteresting ...


    Buying a valvertonik is stupid without comment. Sooner or later you have to break the piggy bank for repair.


    Well, finally, there is a response .....

    To # @ stream of consciousness #

    The so-called "valvetronic" is not only this control engine, but also many other elements cooperating with it, which I will not list here (too long list of parts)
    I know very well that the purchase of the "valvertonika" drive motor itself is a big expense ... and I also know that it will not remove the engine defect mentioned by the author of the topic.

    My point is we have so many heads in the forum and no one has even tried to tackle the problem.

    And now to the point:
    As I wrote earlier:
    The BMW N42B18 engine is a first-class mine with a mileage of over 200,000. km, it will be cheaper to buy a second engine, preferably if it was still in the car, then you can still check its operation.

    greetings
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  • #7 17551415
    Strumien swiadomosci swia
    Level 43  
    You know, if the engine works on a broken valvetronic, it's okay, but then the vanos is also deactivated and the engine loses some power.
  • #8 17552551
    MANTA20E
    Level 16  
    Strumien swiadomosci swia wrote:
    You know, if the engine works on a broken valvetronic, it's okay, but then the vanos is also deactivated and the engine loses some power.


    Our author of the topic only provided the error codes and informed what kind of items he replaced ... without effects, of course ...
    We do not have more information about the operation of this engine.

    Maybe the author of the topic will answer and provide more details and information about the operation of his engine in its current state.
  • #9 17561501
    Costamsie
    Level 6  
    MANTA20E wrote:
    Hello

    From what you wrote in the first post, I conclude that your car has the N42B18 engine.
    If one is there, judging by the faults described, you have a problem with the electric valve timing adjuster and related elements. (I attach a drawing showing this device) BMW e46 318i VANOS: Cylinder 1 Misfire, 274E & 2742 Error Codes - Solutions & Tips Needed

    Generally, it's a first-class mine ... it crashes on average after a mileage of more than 200,000 km.

    Replacing coils, candles, sensors, complete timing gear and other rings won't help.
    Driving into this engine with used timing inverter burrs is also pointless.

    Hardly anyone tries to do it, and if you find someone who knows exactly what's going on and will undertake this repair, the costs may be uninteresting ...

    As for the compression pressure in this engine, if everything is OK in it. it should be at least 13 kg / cm2 on a cold engine on the so-called "oil-free".
    If it is not, it means that the valve timing adjuster is malfunctioning and slightly opens the valves, so you have 10 kg / cm2 and not at least 13 kg / cm2.

    As for computer read errors:
    this only confirms the lack of synchronization of the pulse reading between the camshafts and the crankshaft.

    I wonder why in your case none of the forum members has spoken for 3 days .......

    greetings


    Listen, I checked everything electronic and nothing helped (I had parts with the same numbers from the same beta on the road) I checked if the timing was not changed and also not ... I have no idea what it can be ...
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  • #10 17582364
    MANTA20E
    Level 16  
    Hello
    You changed everything electronic ... and the problem is mechanical.
    Valvetronic in your engine has many mechanical parts that have failed.

    Read my previous posts with understanding.
    Repairing this contraption is economically unprofitable.

    greetings
  • #11 18672107
    gutekxtc
    Level 11  
    Exactly new eccentric shaft, sensor, valvetronica motor + 5 needle bearings + bushings, timing gear set and levers, if heavily worn, will exceed the amount of PLN 6,000.
    Therefore, the entire engine, if not worn, is made to the measure of St. He is playing and it's better not to divorce why only take knocks yet.
  • #12 18672615
    marszałekkom
    Level 31  
    I think you guys have gone a long way to repair. The guy has a misfire on 1 cylinder, and you are already replacing the valvtronic (which does not change the valve timing at all), the eccentric shaft and the entire engine in general.
    I don't want to goof off pretending to know exactly what's broken. But I looked through the Western forums a bit, and a few people had this problem, the cause was a faulty valve tappet. Some also give the lambda probe (strange) as the reason, and it would be fitting to look at the beam between the controller and the coil. Assuming, of course, that the new coil is really working.
  • #13 20958875
    swiatelkowemgle
    Level 1  

    Good evening. I would like to warm up the topic ;) Unfortunately, the engine error light came on permanently. After uploading it to the computer, it read: 274E - digital engine controller. Recognition of engine interruptions. Total error. And 2742 digital engine controller. Recognition of interruptions in engine operation, cylinder 1. BMW E46 with 1.8 engine. The car has traveled approximately 290,000 km. The mechanic immediately said that it was Valvetronic, so it was a skin for layette.... has anyone ever experienced that it was something else? I'm a bit under the illusion that it's a valve lifter issue. Is it worth investing in it or giving up? I will add that I am a typical layman and I am afraid that someone is just trying to scam me. Maybe you have a trusted workshop where they will honestly tell me what and how. I would be grateful for any suggestions.

    Image of a screen with BMW engine error diagnostics.
  • #14 20959132
    Strumien swiadomosci swia
    Level 43  
    It could just as easily be the coil or spark plug or a leak. Change the workshop for sure.
  • #15 21277047
    psycode
    Level 17  
    swiatelkowemgle wrote:
    ...After uploading to the computer it read: 274E - Engine Interrupt Recognition. And 2742 Engine Interruption Recognition cylinder 1.
    .
    and
    Costamsie wrote:
    The computer shows two errors
    274E - Misfire identification
    2742 - Ignition loss - cylinder 1
    .

    Meanwhile, it's been 7 months since the last post, but none of you have written whether this has been fixed and what was the cause? I have the same thing and am curious. And if you didn't fix it, after how long did the situation get worse?
  • #16 21308449
    andrew610
    Level 1  
    Hi. I experienced the above-mentioned error on the 3rd cylinder. Turned out to be a tappet fault. Fixed, it works.
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Topic summary

The discussion revolves around a BMW E46 318i with a misfire in cylinder 1, indicated by error codes 274E (Misfire Identification Total Case Error) and 2742 (Misfire Cylinder 1). The owner has replaced various components including coils, spark plugs, and checked fuel injection and compression (noted to be low at 10 bar). Responses suggest that the issue may stem from the Valvetronic system or mechanical failures related to the engine's timing adjuster, particularly in the N42B18 engine variant, which is known for such problems after high mileage. Some participants recommend considering the replacement of the entire engine due to the high costs of repairing the Valvetronic system, while others suggest checking for simpler issues like valve tappets or electrical connections. The conversation highlights the complexity of diagnosing and repairing misfires in this engine model.
Summary generated by the language model.
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