Did you do a boost leak test to make sure there aren't any leaks

 

Not yet, but this is my next step.

 

how many miles on the car?

i bet your throttle body shaft seals are leaking and maybe you injector seals.

http://www.evoscan.com/technical-veh...ke-boost-leaks

 

the car is at roughly 40,4xx miles and is stock. Originally I assumed that the car was missing the boost pills, but when I went to check, all the vacuum lines were factory with the pills installed.

I actually ran across that link yesterday when I was searching.

Thanks for the advice. Boost leak test should tell alot.

 

Definitely do a boost leak test. Only reason I said boost gauge was it looks like your spike to drop value (~.3 bar) is the correct drop for a stock car but it is low holding boost.