chevyn0va1,
Thank you for your advice. I am not sure on where to look for my o2 sensor and pcv valve. I do plan on changing this on my 2002 Ford Escort. I went to Checker Auto parts and Autozone both don't have a service manual for my the year and type of car. I would love to get a service manual but I can't find one.
I tried taking my car to a Big O Tires and were reluctant to change my o2 sensor. They said only if you get "service engine soon" will they able to change it if not then they won't do it. Know any good websites that may teach me on how to change my pcv valve and o2 sensor?
I have the tools by the way. I just don't want to pay a mechanic a lot of money that I can do in a half an hour or an hour.
I will save up money for a car scanner.
Linuxguy0481