It's kind of hard to explain, but I got a 2004 GTO, mostly all stock besides the guy put a K&N air filter on it. But whenever I have it in drive(sitting at a stop light or just not moving in general) it's not a consistent timing but you can feel a jump or like the engine gets slugged. It don't do it while it's in park though. It almost is like it gets punched in the gut and hicups just for a secound but then is back to normal for a certain all mount of time, and then will do it again after a little bit longer. The car drives amazing and nothing else is wrong with it, this is the only problem and was wondeing if anyone knew anything about it. I was planning on changing plugs/wires and see where that took me first.. Any opinions would be appreciated I could possibly get a video later after work if needed.