3.0 tdi fuel stack.

[Mat196]

I think I need to remove the stack pipe from the tank and clean it because I'm getting low fuel pressure to the high pressure pump.
I have done the fuel filter but fault still there after 30 mins of driving.
I'm wondering if I can get to the top of the tank, sender/stack from under the rear seats ?

 

[desertstorm]

Is the vent to the tank blocked. Air needs to get into the tank to replace the fuel lost, If you open the cap on the tank does it "pop" sucking air in. Could also be the in tank lift pump.

 

[Mat196]

I don't think it does make the pop sound.
When it cuts out after a 30/40 min drive. Bubbles can be seen in the fuel pipe from the filter to the high pressure pump and that's after I've done the fuel filter. I did drive to work this mornin for 20 miles and no fault was there, it got me there without breaking down