Car has 90,000 miles and started to rough idle intermittently. I was going to replace the PCV valve and have the shop manual and looked at the image for component location but still cannot find.

Has anyone else had the intermittent rough idle or know where the PCV is located. The manual makes it seem obvious to replace.

 

Spark plugs are due at 100k. They are Iridium. Might help changing them out but it is a fairly big job and costs big $$ if done at the dealer.

 

Wow, lots of miles. I have 75k on mine, my only issue fuel mileage has dropped about 3 MPG average or more, depending on driving. Air filter, air pressure, etc...Are all good.