once every week/2 weeks vr won't start.turns over fine but won't start.checked for spark-none[when it will not start].but the car will bump start.took the car to dealer-hall sender fault,adviced to check wiring from hall sender[part of coilpack] to ecu and battery via fusebox.cleaned all connections,seems ok.relay 109 is part of this ignition loop?took the relay apart- hairline crack at soldered connection.had it re soldered-car been ok apart from one time it took several attempts to start.will changing 109 relay remedy the situation or faulty coilpack,ecu?any ideas people?cheers in advance!