Honestly, I think it may just be how I am driving. I've been testing with the green spring for a bit and I believe I may just be letting off the throttle just a tiny bit, causing the BPV to open (even though the RPM's continue to climb). With the green spring, the valve seems to open much easier than with the yellow (which is to be expected). I think what I am doing is easing off the throttle just a tiny bit a few seconds before I shift into the next gear causing the BPV to vent. I was most likely doing the same thing when the yellow spring was installed but due to the heavier spring, the BPV was not venting as easily. I will know for sure tomorrow after doing some additional data logging.