I happened to be changing my plugs today and noticed a HUGE vacuum leak by number five plug. There is a large hose there and it fell off. So, I put it back on and "voila" it runs fricking great. I was changing the plugs as I figured it needed a tuneup. Sometimes it is the free stuff that does the most good. I also got new tires today and that made a huge difference in handling over the old bald ones. I got Kumhos at a friend of mine's urging and couldn't be happier with them at this point. (5miles!)