i’ve imported my own shape (animtion 60frames)…
and combustion does loop my particles…
example explosion…after the explosion the partciles coming back…
i put down the particle-number of emitter and behavior (setting to 0, using keyframes)…
and i turned off the emitter (using keyframe)…
all repeats are off…
but the particles are still coming back… 
any ideas ?
thanx…