Mileage is just below 178K. Bought it used about 4-5 years ago and it looked very well maintained but no idea if O2 sensors have been changed. I haven't changed them out. Will do new plugs, O2's. Just changed oil. I'm suspecting the catalytic converter was not as hot as possible. Any suggestions on how to check the EGR system? Is it a valve that needs checking/cleaning? I've done a bit of searching and most of the references to it are for BMW diesel engines. The posts to talk about lots of carbon that can build up and has to be chipped off. Is that what our gasoline engines experience also?
Last edited by foaxaca; 11-01-2012 at 08:10 AM.