K/KE-jet's system's pressure is 6,5 bar.
But that doesn't mean that if yours doesn't have 6,5, it wont work. I have fuel pump, which turned out to be from some MB with k-jet and in it's specifications is pressure - 4 bar
My old pump was leaking fuel just as yours, only not so much, I went to junkyard and bought "pump from B3". Theoretically if u have pump, that u can mount there and which is from k-jet, use it. And u even don't need from k-jet
- at last I know some ppls who use on their NG's pumps from 7A - keep in mind that 7A have EFI with 4 bar system pressure. And vice versa - I know ppl, who have B2 GTE quattro with 1.8 20vt engine, but fuel pump is left from DZ. Reason - system pressure is regulated by pressure regulator - so pump will pump 6,5 bar, or will not, but this is unlikely