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The CEL is powered by the ECU. When it flickers, the ecu is actually dying and coming back to life, that's why your engine is cutting out.
I'm not sure what it has to do with over 3k rpm's, though. You need to check your main ignition power wire. Underneath your steering column there is a plug coming from your ignition switch. The white wire will have 12v with key off, engine off. Switched 12v there is going to be a black wire with a red stripe.
The reason your dummy lights don't come on is because this wire is the same wire that connects to something called your bulb check relay so you can see that all your lights work when you turn your key to the ON position without starting your car.
It's the same reason you're not getting fuel. S chassis computers supply a switch for the grounding of the fuel pump. If your ECU cannot power on, it doesn't flip the switch.
What I would do if I were you was check my ignition wires. Take off your surround for the steering wheel so you can see the ignition and harnesses. Also take out your cluster, make sure everything is tight. If your cluster is grounding out then it is taking all the juice from your 12v wire, leaving your ecu high and dry for voltage. Maybe around 3k RPM you get a vibration that moves some wires towards a short. An easy way to check this theory is to unplug your cluster and try starting your car.
You may have to check your engine control fuses in your engine bay now that you are getting no power whatsoever. Let me know what you find.
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