In diagnosing my idling issues after the intake refresh, I've noticed that it always takes two key turns to fire the engine now. The first key turn only produces a fast whizzing noise, but does not turn the engine over. The second key turn fires the engine immediately like it should. Does this imply a bad crank position sensor?

 

Can you locate the fast whizzing noise?

I would think a bad CPS would still turn the engine over, but wouldn't fire. It sounds more like a starter/voltage issue to me.

What was involved in your intake refresh and was the intake refresh done to address any running issues or was it running/starting well before?

 

This was supposed to be a light intake refresh in order to correct a TPS issue before Third Coast. I did knock sensors, intake gaskets, fuel lines, Temp II, oil drain hoses [to cam covers] and a few of the vacuum lines. The CPS needs to be replaced eventually. The only running issue I had before was a lack of WOT due to the TPS being bad.

The starter definitely flies, but doesn't turn the engine over... almost like its not connected to the flywheel...

 

check the 14 pin connector above the hot post.
you may have a sticky starter solenoid

Swap out the starter relay with the horn