My 97 Se-r rides fine for about 20-30min then bogs and then idle drops once in neutral.I have to crank it even in the highway and keep my foot on the gas. I can not really figure out why. Thought it was the leak between my two o2's but then i got new headers and it still does the same thing.I am thinkin it might be pcv.Need any kind of input before I do what I have never done.....take a car to the shop. Oh yea readin o2 sensor but replaced it but it is still readin????