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Passat B5 1.9 TDi 115HP - Tugging During Acceleration Despite Injection and Fuel Filter Changes

prezes94 31275 7
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  • #1 17091742
    prezes94
    Level 19  
    Gentlemen, the problem is as follows. The car is freshly bought, it starts to tug when accelerating, it happens especially in the lower rev range. The computer did not show any errors. Correction of injection ok, however, it was found a poor dose on the 3-stroke pump. Changed for a used but tested, new fuel filter and zero improvement. The previous owner said it was the fault of the inner joint, but my mechanic, after checking the play, ruled out. Due to the fact that the mechanic at this moment breaks down his hands or proposes to exchange the rest of the injection here, I am asking for some suggestions on what to do next. I'm throwing photos from my computer. The last photo is the correction before the injection replacement.
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  • #2 17091811
    jaszczur1111
    Level 33  
    Possible leaks in computer and turbine pneumatics. Leakage of the fuel supply system on the suction side.
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  • #3 17092329
    prezes94
    Level 19  
    jaszczur1111 wrote:
    Possible leaks in computer and turbine pneumatics. Leakage of the fuel supply system on the suction side.
    you conclude it after some specific parameters from pictures or after symptoms?

    Added after 14 [hours] 22 [minutes]:

    Gentlemen, the next aspect has come, today after removing the fuel filter when it is put in, it does not go on fire. He went all the way and he did not get lost. From the breather of the vacum pump, only the oil drips at the crease. Could she be the culprit here?
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  • #4 17095803
    jaszczur1111
    Level 33  
    I applied after the symptoms. How can oil go from the vacum pump? Do you mean the decoy in the filter? I maintain that there is a leak somewhere and does not suck in fuel. The dragon in the tank can be used for this

    I had similar symptoms in this exact model, when the hose stiffened at the fuel filter and the hose clamp did not hold properly.
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  • #5 17119418
    prezes94
    Level 19  
    At this moment it is like this. After replacing the vacum pump the car started without any problem. There is practically no jerking but there is such a strange feeling of "mulching" during acceleration. During the acceleration, feel as if something was holding the car. I changed the flowmeter but no result. I noticed broken cables at the temperature sensor, but by that I can only burn more. The mechanic said that maybe it was something of a turbine, but that's just a guess. In addition, when the gas is added, the outer lights go down and I do not know if it can have any connection?
  • #6 17119872
    jaszczur1111
    Level 33  
    Damn, the car is full of various minor faults. If the lights dim, there is a problem with charging, or a large receiver turns on. The first thing that comes to my mind is the fading alternator. The big receiver are glow plugs and ABS pump. A common problem is the failure of the controller from the candles or the lack of contact with the temperature sensor. This causes the candles to heat up all the time.
  • #7 17125575
    prezes94
    Level 19  
    Unfortunately, I bought it, it was used to commute to work and to "dirty work" and only spoils my nerves. The previous owner, before selling, changed the alternator to use it and set up a new battery. However, he said that he does not really like loading, because in the morning the car is hard and it really is ... I am able to live through these dim lights just the question whether this is what it is "mulenie" when accelerating?

    A few days ago I added a Carlube cleaning agent to the fuel system. The car again in the fifth gear at about 2000 revolutions lint as before. Could the fuel filter come out again?
  • #8 17167579
    Przemomolrd
    Level 1  
    I was struggling with the same problem for a year, I exchanged turbine, pumping up everything in turn, it turned out to be guilty of a pump in the tank, it burned quite a lot, today I changed the cartridge in the pump and it stopped tearing, check someone in the boot let someone break the ignition and listen whether the pump is, if you do not have the cause, I greet :)
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Topic summary

The discussion revolves around a 1998 Volkswagen Passat B5 1.9 TDi with a 115HP engine experiencing tugging during acceleration, particularly at lower RPMs. Despite replacing the fuel filter and a used injection pump, the issue persists. Users suggest potential causes including leaks in the fuel supply system, issues with the vacuum pump, and electrical problems affecting the alternator and glow plugs. The original poster reports a "mulching" sensation during acceleration and dimming lights, indicating possible electrical load issues. A user shares their experience of resolving similar symptoms by replacing the fuel pump in the tank. The conversation highlights the complexity of diagnosing and resolving such mechanical issues in older vehicles.
Summary generated by the language model.
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