2l 8v driving then cutting out no spark

Good evening  . I have a problem with my caddy bakkie it has 2l 8v motor in with dictator management.  I drove it this morning  to work .  Started it later the afternoon all it did was swing continuously.  I changed  the coil and it started.  I then replaced  the plugs ,plug wires, module, rotor and disi cap .  Later the evening i drove home . And it cut out . Swinged a couple of times like there was nospark and it then eventually started.  I need advice where to look what to do