my wife has a 2002 cavalier Ls. this car has been great aside from the struts going with only 55,000 miles on it. guess that's pretty average though. does this car have a pcv valve and if so where is it located. i want to tune it up because lately it just doens't seem like "itself" anymore. used to be real peppy and now seems kind of sluggish. I know the plugs are supposed to be good till 100,000 miles but i don't belive that stuff and replacing the plugs early cant do anything but good so i'll just replace all the normal tune up stuff.