hi there i have had a similar problem with same unit exactly same fault changed numerous things unit would run and sometimes not start or cut out when running check the wiring at the distributor plug and by that i mean grab the wires and pull them see if the wire is broken inside if it is the wire will stretch the outer plastic if you see what i mean the wiring is sometimes wrapped in an s shape and its to tight our wire was broken close to the dist plug i managed to solder it back temp repair and ordered that harness section from combilift it is only a very short piece of loom hope thats your problem