C5 X7 difficulties to pump diesel

[Zokom]

As title say since I bought this car in 2019 I always had issues with pumping diesel, as soon as I press the pump to the max it lock because the air doesn't flow away (my guess), I tried everything, different positions, different vendors but the problem persist, I think I managed once to pump for 20 seconds straight without the pump locking, I searched the whole internet for a solution of where the tank breather valve could be or some solutions but I can't find it. What could be the issue? My Car is a C5 X7 tourer exclusive from 2010

[KennyW]

Welcome to the forum,

What exactly do you mean 'press the pump' Are you talking about the manual pump in the engine bay ? If so these have a one way valve fitted to prevent fuel running back to the fuel tank. These do stop working correctly and an airlock can develop stopping fuel delivery to the HP pump.

Kenny

[Zokom]

Thanks for the welcomming, I mean at the gas station, when I need to pump the gas in the tank (sorry I'm not a native english speaker, I forget some terms sometimes)
Even small amounts like 10-20 liters, I start pumping and it stop because the sensor says its full but it isn't

[KennyW]

Okay,

When filling at petrol station you can only get 10 or 20 litres in, have you checked for any blockages in the filler neck (pipe into fuel tank) going to the fuel tank.

Kenny

[Zokom]

By 10-20 liters I ment small amounts of diesel, I havent checked for any blockages, would I need a camera of some sort to check?