fuel system..

[panserpilot]

hi i have a mk2 1978 retired posty van. it recently conked out when i drove from katherine to darwin (300kms) a mechanic friend of mine said it was the fuel pump, but when i took it apart the fuel pump was clean and working and the seals were fine. i took the fuel tank off to flush incase that was the problem and also blew out the fuel lines.
the problem is that at speeds above 35km/h the engine cuts out due to fuel starvation. as you can probably tell i am a relative newbie at mechanics but am learning as i go any help would be appreciated. i can take photo's and get more in depth details if anyone thinks they can help...

ps. when i took the fuel tank off i noticed the cap at the top (where all the pipes come from) didn't match the plans i had.
can anybody tell me how the fuel lines are supposed to be set up. it has a carbon cannister if tha t helps at all.... sorry about the information being all over the place......PLEASE HELP!!!!!

[John Grove]

Sometimes the pump may look ok but actually be tired. I'd suggest that you get the output pressure checked. I'm not sure but I'd expect around 4 psi minimum. Also, make sure that the fuel pipe isn't routed anywhere it could get too hot as this could cause fuel evaporation. John G

[cartooner]

Float or float needle stuck in carb?