P code expert?? What's the trim "system"?

[btrvalik]

Just checked those plugs and mine seem fine. Since it's warm this afternoon, I decided to poke and prod at some of the vacuum lines with a stethoscope to see if I could hear a leak. Didn't find anything so I hopped back in the car to pull it back in and low and behold, the CEL was off!. Now the question is what the hell did it. The only thing that seemed to effect the engine was when I pulled the CCV hose off the valve cover. I didn't notice much of a RPM drop when I pulled it off, but the idle jumped a bit when I put it back on. Wonder of I had a bit of blockage in that line that opened up? I also gave the post car 02 sensor wiring a "shake" but the signals still look the same. My fuel trims also look about the same.