95 Aurora Valves

I have a 1995 Oldsmobile Aurora with 120000 miles on it. I have finally got the back firing and engine stuttering problem and have researched that it is the spark plugs/wire sets so me and my dad are replacing those this weekend. Since we are also doing an oil change I decided I might as well replace the PCV valve and check the EGR valve. One problem is we do not know where these valves are located on my car. If someone could do a quick but some what detailed explanation where these 2 valves are that would be fantastic. Thanks for the help!

go to ACNA... this forum is dead

In spite of the above post follow this link for the egr info,. http://www.howardm.net/dred98/egr.php. Pcv back side of engine , pass side in the valve cover.