I've been dealing with a similar problem, and although I have not figured this out yet, adding what I have done might prompt someone else to chime in.

Car would randomly die while driving, no CEL. Started simple, plugs. Next day same thing happened. Changed Cam Sensor. Got two days before issue returned. Changed Crank Sensor. No more random die, now I get CEL, multi cyl mis-fire. Changed plug wires & coil out. CEL persists, hasn't randomly died though.... ???

We have fuel at the rail, with a presure tester @ about 45-50 psi, so that should not be the issue either?

Anyone else been thru this already?