2.5dse Fuel problem when starting

Right here is the latest glitch on my rangy. when left the fuel sometimes drains back into the tank (the fuel line is clear tube so it can be seen with no fuel in it) it then takes awhile cranking to re prime the injector pump but starts ok (new heater plugs) only happens 50% of the time and while cranking you can see the fuel appear in the line at the filter and then it fires up ok air is getting in somewhere any body have any ideas??

cheers guys.

ya non-return valve aint!?

Change your perished leak off hoses,but dont buy them from LR cos they have just put the price up to "gold plated" rate.

Where is non return valve located?

Dave

trust 8inavees answer more than mine - mine wuz a guess .