Sorry to hear, have you figured out if it is fuel or spark, mine turned out to be the coil, it showed no symptoms but replaced with the correct blue high voltage Bosch coil from Diesel-Electrick and I am surprised with the allround better behavior of the engine.
Not sure as yet, i had 0 tools or multimeter or anything. And being on the side of the N1 alone I couldn't even hear if the Fuel pump buzzed.
So fokkit, Im replacing the coil, fuel pump relay and fuel pump now. Im gatvol so just gonna do this and see.