Make sure you spark plug wires are ALL hooked up. I looked today because I suspected it and sure enough, there was one dangling down by the header completely unhooked. So if you see one like that just plug it back in and you get a big HP boost AND better fuel milage.
Now if you ever see two dangling down side by side, DON"T HOOK THEM UP. Close the hood and go find an adult. It can blow up your engine!!
Original Post