Any help would be greatly appreciated...

So i have recently bought a 93 Chevy K2500 with the 6.5L TD...
It starts up and idles good. when its warm it stalls out as if its lacking fuel. But it restarts after cranking for under a min... helps if i play with throttle. I have replaced the lift pump. i can hear the lift pump running when the key is in the run position ( even when not running ).

I checked and installed a new fuel filter by the intake, someone had previously removed it. it is full of fuel when idling, when i checked it after it stalled it was not full, but that was before the filter was installed.

I have opened the valve at the front for bleeding fuel ( by oil fill ) and put the hose into a bottle, if truck is not running with key on i get a steady flow of fuel, but with truck running at idle i get none...

i had the truck out yesterday and it lost power and speed and eventually stalled...

I have read about guys cranking up the fuel on the injection pump but am not sure if that might help...


Any ideas would be greatly appreciated.