Stage I - Tune-upPerformed a tune-up on her last week and boy do I really, really, REALLY despise EGR pipes/valves. Seriously, they ruin the inside of your intake manifold, throttle body and valves expelling all that hot, dirty air into my cool, clean intake. I'm all about stopping harmful NOx entering the ozone and all but there's got to be a better way. Maybe it's a conspiracy by the auto industry to develop one more thing that will deteriorate the vehicle and force you to service it to keep manufacturers and service techs employed then make up an excuse about saving the environment. Out with the old, in with the new. Look how bad the carbon buildup was on the intake manifold! Seriously. Screw that damn EGR pipe.