I went out for a ride today with a friend in my car, never has had any problems, but then again I just bought it. Blah blah parked it and went back out about 3 hours later. I reverse out of the garage and im gonna just cruise around, but in first gear it sounded really loud, like at 2k rpms it felt like 5k or something along those lines, but the car wasnt pulling at all. Same with all the gears. I could finally pick up speed, but it was hard, and it sounded wayyyyy loud. Also if i almost floored it, it would stop at around 4000 to 4500 rpm. then finally kick in (?) more and go up to about 5200 and I would shift. (I don't normally shift like this, i was just trying to see if I was only imagining my car funky). Also the car gives off a weird smell in the engine, like a burnt rubber smell? Or something along those lines. Also 5th gear is COMPLETELY gone!??! That really worries me.... It was just working fine! In 5th gear is basically NEUTRAL? I was cruisin and I thought 5th was neutral! Im pretty sure reverse works fine so far.... Havn't really backed up much at all.. Please help! Maybe if I just let it sit for a while, problems will help themselves? 
Psh. Heeeeelp 
EDIT: About a 6 days ago I installed a K&N FIPK System if that helps at all!
Hmm thinking about it more, also If anyone knows about the k&n kit, you know the 11/16 hole your supposed to drill? Well my dad didnt have a drill bit that size so i drilled like a little more than half the size, and the IAC(?) Sensor is not fully in, but it's been driving fine without it..Could that also be a factor?
Psh. Heeeeelp EDIT: About a 6 days ago I installed a K&N FIPK System if that helps at all!
Hmm thinking about it more, also If anyone knows about the k&n kit, you know the 11/16 hole your supposed to drill? Well my dad didnt have a drill bit that size so i drilled like a little more than half the size, and the IAC(?) Sensor is not fully in, but it's been driving fine without it..Could that also be a factor?
does the shifter go into the gears or does it grind?
