Weird Idle Cycle with Vacuum issues? 2003 Mazdaspeed Protege

Hi Guys, slightly stressed with my 2003 MSP, I'm hoping people are still pretty active on here.
The issue is I start the car, the car idles normally for a second sits at 2k, and starts coming down like a normal first start of the day. while it's higher in the rpm my boost gauge shows 20 vacuum, then the RPMs start to die and approach 0 on the cluster. While it does this the gauge goes to 10 vacuum. If I press the gas at all it goes right to 0 but doesn't build boost. While doing this the pedal position makes no change on the rpms. It cycles from just about to die to jump to 2k rpm and back again down a couple of times and then dies.

While I messed with things, read codes, and tried to fix this some of the codes I would get were...

Constant:
P0031

Sporadic:
P2009
P0090

I had a P0660 and P0103.

I've replaced the MAF in the last week and tried two different fuel pressure regulators. and got a new intake valve solenoid.
The old MAF read 2.3v at idle I thought that was high so I got another and it read the same
All three of the valve solenoids read ~40ohms
There is gas on both sides of the line from the regulator.

I'm running FMIC and a BOV, all charge pipes, intake pipes, and vacuum lines are connected with no signs of leaks.
 
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Have you had a smoke test done to rule out an overlooked vacuum piping or coupler issue? My setup is significantly different than yours so I'm spitballing 🤷‍♂️
 
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