The PVC sucks in also. Why do you say not to do it through there? That's where I did it through this weekend. I Used the a cap off a spray can as a "cup" and then removed the PVC because I was going to change it anyways. When you remove the PVC the car rev's up, but as long as you just put your thumb on the hose it runs normal, and I just removed my thumb off the hose right when I was gonna stick it in the cap. I had cleaned out my TB about 10K miles ago using carb cleaner, and I still got plenty of crap out of the engine. You can definately notice when you start burning the carbon build-ups. It smells like ass when it burns. Car is definately feeling more "free" and smoother. Little more peppy. But then again, I also changed all my fluids, and upgraded my coil. The smell of the carbon burning definately tells you this stuff is working though. The oil came out thin and dark as hell after I put 1/3 in the crankcase and let the car idle for about 5 minutes.