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[Solved] Renault trafic 1.9 dci 2005 - difficulty starting the engine after a long post

jercyr 21507 19
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Why does a 2005 Renault Trafic 1.9 dCi have hard starting unless the fuel system is primed by hand, and how can I fix it?

The most likely cause is a leak or loss of fuel pressure in the low-pressure side of the diesel system, especially on the return/feed side or in the primer bulb’s non-return valve [#16337282] [#16340957] Check the tightness of the fuel line from the tank to the pump and inspect the bulb, hoses, connectors, and filter area for air ingress; if the bulb does not hold fuel, replace it or fit a separate non-return valve in that line [#16337520] [#16337282] One reply also notes that in this car a leak in the return circuit from the rail or injectors can directly cause hard starting [#16340957] If the problem persists, also check the rail fuel pressure sensor and the pump pressure regulator, and inspect the small pre-pump on the high-pressure pump, which can seize [#16340957]
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  • #1 16337152
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    I come back to the matter after a few days. It seemed to me that the soldering of micro switches on the key board had a direct impact on starting the engine. However, it turned out that this was not the reason. Someone suggested that there is probably no pressure in the fuel system and that this is probably the cause. It turned out he was right. I asked if there was an additional fuel pump in front of the injection pump in this car and I received two answers; one that there is a pump in the basket in the tank, and the other that there is a cylindrical pump between the tank and the injection pump. When I got to work, it turned out that there is no pump in the tank, neither between the tank and the injection pump. :) :) :) I came up with the idea to use the bulb at the air filter housing to increase the fuel pressure during startup :) but I need a helper for this task :) :) :) I turn the key, and the colleague - the helper pumps and then the engine starts and does not go off when the colleague stops pumping. My question; what to do so that I don't have to use a friend's help? What could be the reason? However, it can add a pump although the manufacturer did not use it in this model? 1.9 DCI, Renault trafic - a short tinplate from 2005
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  • #2 16337282
    rafal35
    Level 18  
    Posts: 173
    Help: 23
    Rate: 47
    It is worth checking the tightness of the fuel line from the tank to the pump (especially around the pump).
  • #3 16337324
    sadek1979
    Cars specialist  
    Posts: 2534
    Help: 231
    Rate: 1404
    If a colleague would look at a certain auction site, e.g. all ... he would see that fuel pumps for your car are being sold. So it seems to me that my colleague did not check thoroughly. They describe such numbers 0580453496, 8200084183, 8200071331. (Eg auction 6736866405) Maybe my colleague will look at how many wires go to the tank because in my opinion two thick and two (three) thin ones will go. I could be wrong, of course.
  • #4 16337431
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    I took out the tank, unscrewed the cap, took the basket out of the tank. two fuel lines are connected to the bin, and when it comes to electric ones, there are only two thin electric lines to handle the measurement of the amount of fuel in the tank and that's it. it's a pity that I didn't take photos, there would be no doubt then

    Added after 6 [minutes]:

    I checked the tightness. Every time, when I start with the help of a colleague, when I press the gas pedal it is as if choked and only after a while there is a sudden increase in revs, but when I take my foot off the gas pedal for a while, it all repeats

    Added after 6 [minutes]:

    ... and going back to the topic of the pump in the tank, it was also - like a colleague - I was convinced that the pump in the tank is present and I even bought such a pump. I was very saddened that she was not there and that the problem with starting the car would not disappear.

    Added after 4 [minutes]:

    I'm afraid it's the head pump that goes out and doesn't hold the pressure
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  • #5 16337520
    sadek1979
    Cars specialist  
    Posts: 2534
    Help: 231
    Rate: 1404
    The pump did not necessarily sit down. There is a non-return valve in the bulb that you pump the fuel into. Personally, I would replace the pear or disconnect (together with plastic hoses and connectors) and put a non-return valve in this place. If it would have an effect, it would be a new game. Try as I write because you are able to do it yourself and without much cost.
  • #6 16337726
    andrzej20001
    Level 43  
    Posts: 17695
    Help: 1568
    Rate: 6610
    You have a leak. Replacement pump PLN 200 powered by ignition or replacement of wires and pears. The question is what's faster
  • #7 16337941
    vemo
    Level 12  
    Posts: 40
    Help: 3
    Rate: 23
    andrzej20001 wrote:
    Feed-through pump
    what???
  • #9 16338728
    vemo
    Level 12  
    Posts: 40
    Help: 3
    Rate: 23
    As I thought you have no idea.
    There is no pump in this model!
  • #10 16338729
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    there is no pump other than a high pressure pump

    Added after 4 [minutes]:

    I will try on Monday to do what Tomasz proposed - a check with a check valve.
  • #11 16340504
    pp_pablo
    Level 27  
    Posts: 805
    Help: 93
    Rate: 401
    Gentlemen, there is a check valve in the pear but I'm not sure if it matters if the car smokes and is not airy. I will write why I think so. I now had a 2.0 DCI 115KM trafica with a damaged pear valve. It could not be bled. Pear non stop soft. Fuel filter new. As I took off, the fuel line did not pump fuel at all. When I sucked in fuel from the hose (behind the pear) it went without any resistance. I filled the wires with the syringe, pinned them together, and started the car with a pickup. It came 5 minutes, he vented himself and then the problem did not come back, whether after an hour or two days or a week. There was no problem with firing. The fuel was not retreating.
    PS. As for the additional fuel pump. I have not encountered such at least in cars equipped with a pear. I rummaged at several Masters / Trafice 2.5 DCI (120i146KM) 2.0DCI.
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  • #12 16340813
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    do such cars have something like suction? maybe this element is failing, because as I wrote before; until the engine heats up or I don't hold the accelerator pedal for about 1/4, then the car has no power at all, barely the wheels roll flat, but when I get the temperature or when I gradually spin it, it suddenly starts, as if shot from sling
  • #13 16340863
    pp_pablo
    Level 27  
    Posts: 805
    Help: 93
    Rate: 401
    jercyr wrote:
    because as I wrote earlier; until the engine heats up or I don't hold the accelerator pedal for 1/4, the car has no power at all, the wheels barely roll flat,


    I'm a little lost now. Does your hit have a firing problem or does it fire normally and has no power?
  • #14 16340868
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    does not fire normally. I wrote that I need a helper to fire
  • #15 16340957
    pp_pablo
    Level 27  
    Posts: 805
    Help: 93
    Rate: 401
    Fuel pressure sensor on the rail, pump pressure regulator OK?
    In this car, as there is any leak in the fuel system on the return (from the rail or injection) it will be a problem with firing.
    At the high pressure pump is a pre-pump (size like a matchbox) likes to twist the axle.
  • #16 16341068
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    will you have to pull out the entire pump to check it?
  • #17 16343378
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    will it not be a defect of one of the temperature sensors, which means that the suction will not start?
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  • #18 16375867
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    I was driving today and it turned out that I could not exceed 3800 revolutions. when I apply the accelerator at this value it seems to be choking and I can't do any more
  • #19 17303073
    ryba660302
    Level 10  
    Posts: 6
    Rate: 6
    jercyr - did you solve the problem ??? I have a megane II with 2.0 dci engine and it also turns to 3800 revolutions and I have problems with morning start. It takes a long time to make him smoke.
  • #20 17439801
    jercyr
    Level 8  
    Posts: 26
    Rate: 7
    I scrapped the car
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Topic summary

✨ The discussion revolves around starting issues with a 2005 Renault Trafic 1.9 dCi, particularly after prolonged periods of inactivity. The author initially suspected micro switch soldering on the key board but later identified a lack of fuel pressure as the primary issue. Various participants suggested checking the fuel line tightness and the presence of a fuel pump, with conflicting opinions on whether a pump exists in the tank or between the tank and the injection pump. The author confirmed no pump was found in the tank and proposed using a bulb at the air filter to manually increase fuel pressure during startup. Suggestions included replacing the bulb or adding a non-return valve to improve fuel delivery. The conversation also touched on potential leaks in the fuel system, the importance of the fuel pressure sensor, and issues related to temperature sensors affecting engine performance. The author noted difficulties in reaching higher RPMs and ultimately mentioned scrapping the vehicle.
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