then why even have the cat if they are both before it? they are called pre and post cat oxygen sensors for a reason... obd-2 has one in front and one after the cat to make sure the cat is working properly

 

sorry, but that sounds like a waste of money to me . . . that's an expensive part to reaplace when they may be just fine.

 

I can't agree with you more but I read that you should change them @60,000 mi...Almost $50 but just wanna make sure my car is in top condition...may even help a tad with mpg 'cause when 02 sensors get old your mpg's go down...
Maybe I am a car crazy guy...dunno...

 

It seems that the fuel filter in IN the fuel pump. Usually there is on in the fuel pump on the pickup and one somewhere else in the fuel system, but i can't seem to find the 2nd fuel filter on my database. Perhaps it doesn't exist or the database might have left it out (which they do sometimes). About the O2 sensor, if you aren't throwing a check engine light and you don't know tha the O2 sensors are bad replacing them will not do you any good. Its more or less a waste of money.