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Thread: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester?

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  1. 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
    #1
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    Hi Guys,

    Recently bought a 2015 VW Golf 2.0 GT TDI and need help with getting it to run right. It is a DSG model.

    The car when it eventually did start would run very rough with an obvious fueling problem. VCDS scan showed up a P0087 code for Fuel Rail/System Pressure too low.

    The garage started off by changing the fuel filter which did not help.

    I then source a known good fuel rail with the sensors on each side and had the garage swap this over and again it did not help.

    The garage pulled and checked the in tank fuel pump and assured me it seemed to be working as it should although they had no way of measuring this to make sure 100%.

    All online searches after this led us to believe that it could be the high pressure fuel pump and so i sourced a known working good used pump and had the garage change this over and also change the timing belt and water pump at the same time as they were there. Although it initially seemed to run alot better, it still wasnt right and still had some sort of fueling issue. The car runs but randomly cuts out, sometimes straightaway, sometimes after a good while. VCDS scan still shows up the P0087 code.

    VCDS scan shows up several other voltage faults but this is likely to due it having a new battery recently and not being driven since.

    Lately im struggling to get it to start at all.

    Anyone got any ideas?

    Anyone able to recommend someone who knows their stuff in Manchester to take a look?

    Thanks

    Billy
     
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  2. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    Unless the system was thoroughly bled using the pump run function in basic settings, even a brand new pump can be destroyed in seconds and this can send swarf from the pumps body into the injectors and it cannot be removed. Why Bosch did not apply a technical coating such as Teflon or DLC to the pumps body only Bosch and VW will know the answer although we can all guess.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
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  3. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    " Anyone got any ideas? "

    The high pressure fuel pump can only supply a limited amount of high pressure fuel.

    If one or more of the injectors is leaking fuel back to the return pipe, correct pressure won't be able to be attained.

    The same goes for the pressure regulator on the HPFP if that is leaking.

    It's fairly simple to check the return spill pipes for excessive leakage from the injectors.
     
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  4. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    It seems you are at square one again with the repair. It needs to be checked if the in tank strainer is clean when fuel level is low, also if the inline electric fuel pump (second electric fuel pump) is working.

    There is plenty of possibilities but one is the hpfp is yet at fault.the recommended repair is to change all associated components in one go so the swarf is eliminated. Since your previous repairs were done one at a time its hard to calculate whether its the previous swarf or the newer pump or both.

    Was the newer pump adapted?
     
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  5. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    Not all of them have the intermediate electric high pressure fuel pump (it looks like a variant of the Bosch 044) and I know on the ones that do, I have never seen a mechanical HPFP fail which is telling. I think removing it must have been a cost saving measure. Billy, as someone has been at the lift pump, check the fuel lines are on the right way around, I have seen a number where these have been interchanged... the daft thing is with a full tank they still run!


    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
    !


     
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  6. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    Thank you for all the replies guys.

    Is there anyway to get my old HPFP tested ? If so and that comes back as good it will mean I can maybe eliminate that as being the problem? The garage said there were no signs of metal shavings etc when they removed the original pump.

    Thanks for that picture Crasher, I have actually ordered a new in tank pump to try which should arrive soon, will check the way the pipes are fitted tomorrow.

    The car is difficult to start, easy start helps get it going and sometimes it will turn off straightaway, other times it will idle fine for a long time. Engine is clearly in limp mode when running and slightly revving it will sometimes make the coil light flash but no engine management light is on. When running and since the HPFP was changed however, it does sound 10x better but obviously has not sorted the low fuel pressure P0087 code.

    Just checked my VCDS scan and I also seem to have a related P1065 fault code?

    There is an obvious ticking sound coming from somewhere in the engine bay after the car has been running also, not sure if linked?

    It’s a shame I can’t really find any local specialists who seem to know what they are talking about either and so the car is back with me for now until I can pinpoint what the problem is or maybe until I find someone trustworthy to take a look. Already spent so much money on it and not any where closer to getting it running properly again.

    I have recently got VCDS, is there anything in particular such as live data that I can get from here and compare that may help? If so any help would really be appreciated.
     
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  7. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    A couple of pics below of the wiring on the intank pump and also fuel filter housing, any ideas if my in tank fuel pump looks right with the 2 wiring connectors? All pics i have found online show one larger connector only and the new pump i ordered also has one larger connector?:
    IMG_9495.jpg
    IMG_9494.jpg
    Attached Images
    Last edited by billy187; 05-03-2021 at 12:10 PM.
     
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  8. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    Black is feed blue return. I have a Golf 7 on one of the lifts, I will take a picture.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
    !


     
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  9. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    Thank you
     
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  10. Re: 2015 golf 2.0 gt tdi fueling problem - p0087 - please help - any specialists in manchester? 
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    Yes, that is correct

    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
    !


     
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