I will just be driving at a speed of between 40 and 45 mph and it will be at about 1200 rpm's and it will go upto 1700 when i'm at just enough gas to keep it at the current speed. and then if I let off or push it slightly more it will go back down to 1200. I'm wondering if there's an air leak somewhere? I made an intake and cut a hole in a rubber part of it and shoved the vacuum hose in there, but it was a really small hole because I wanted to make sure it would not leak. I mean REALLY small hole, it took 2 people to shove it in there. and also sometimes when I start it up it will have a rough idle and idle at low rpm's. It kinda fluxuates a bit from normal rpm's to lower ones. and then when I put it in gear it's fine. so I'm thinking an air leak somewhere. Can anyone help me out here? Those things only happen in those two situations. none else. Thanks a bunch.