Took the Z to Toronto today. Boosted, broke necks, started making my ***-groove in the new leather seats, and threw a code. Also, I'm very happy with the new steering wheel, it kicks butt.
So the stronger springs keep the BOVs closed, but that didn't cure the idle problem.
Next I have to find my windows laptop, turn it on so it can spend a couple hours updating , then take it out the the garage to pull the code. No biggie, just annoying.