engine dieing

[subarufamily]

Hi just logged on for first time had an Xt6 got rid of it and got legacy got rid of it etc anyway bought an svx 1993 ann. edition and started driving it ran great for about 3 months since then has devoleped a nasty habit of dying sometines in park or while driving can most of the time be restarted but not always Will ALWAYS crank though simetimes starts to only die again can most of time be fixed by turning completely off and restarting it can anyone help me with this problem it is annoying and dangerous