Well, I just got back from cruising around with my buddies, and I had a slight problem. While we were out, this kid in a turbocharged VW golf looking car decided to mess with me. After my friends suggested I crush him, I did. I flew off a stoplight and basically had him by three car lengths till the next light. He gave me more looks, so this time I let him pull about two car lengths and then I flew by him anyway. It was kinda funny. Anyway, when we got back to my buddies house, I could hear this weird hum coming from the engine bay. I got worried, and we started looking. I found that it was the thin walled vacuum line that I had connected to my PVC valve and my AFPR (it's got a T in it with two lines out to the two items.). The vacuum was so strong it was making the hose collapse and causing it to make a fart like noise. I replaced the hose with a thicker one, and the buzzing went away. After that, I walked around the back of the car and saw alot of visible exhaust coming out of the car. It was dark grey/black, so I know it wasn't oil or water. It smelled really rich. I tried messing with the idle and such, but it was still rich. I ended up leaving, and dropping my other buddy off. At his house, it was still puffing rich fumes which were visible. I returned home, went out back, and the exhaust was back to normal. No rich smell, no cloud, just normal. What's up with that???