Quick Advice: Secondaries not opening

[Billy Mild]

In the process of preparing my car for a NASA HPDE event on Saturday. I replaced the coolant hoses, and oil hoses as my oil hoses were leaking. Tonight was my shakedown run. At first the car seemed to run great and the secondaries were definitely opening as it was throwing me back in the seat and moving rather well.

The more I drove the car it seemed to have a little less power. Not breaking the tires lose in 1st or 2nd gear like normal. It also didn't make a difference whether I had the power key on or off. (The scanner did show a difference between valet mode on or off)

I hooked up my MT2500 before the test drive so I could monitor the engine, and oil temps. My oil temp sensor has finally went bad as it read -40 degrees, but outside of that everything seemed normal. I set one of the LED to be ON if the secondaries were closed. At first the car would flip the light off meaning the secondaries were opening, but after a while I noticed no matter what RPM I was at that light would just stay on. This indicates my secondaries were not opening. Even reving the engine my secondaries wouldn't open.

I just did a quick check of vacuum lines with mity vac and they are tight. No loss of vacuum at all. My vacuum pump is working as well.

TL;DR version: Car runs great up until it has been driven maybe 15-20 minutes or fully warmed up. The secondaries quit opening at that point. Any advice is greatly appreciated.