1995 bmw 318i cutting out at high rpm

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Aug 7, 2009
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I have this motor that will start and idle perfect, no codes, and will pull good until about 4500-5000 rpm it will start skipping and fell like ignition breaking down so bad that it feel like its it's a rev limiter.
I check fuel system good pressure. But the coils will fire double (once very time per crank turn) when it ack up. Then when it not acting up the coil will fire once every other turn of the crank like it should. I ohm the check the cam and crank and are in speck. But I'm getting a little of an hour glass shape the crank sing to the pcm. Would this set of my problem of the high rpm issue? :-\