I have 01 ES 3.0L tribute. As long as you dont take her out of her comfort zone (changing parts unnecessarily or pushing her harder than nice) she is pretty reliable.One day driving home from work i had to punch the accelerator and took the engine to almost 5000 rpms. The mil came on gave me a emissions code. Cant remember the code because i replaced the vacuum lines and a different code appeared replacing the other. P1409. I replaced the dss sensor and no change. (I would like to know how to test these sensors) anyway it idles as if the pcv valve is bad. My scan tool says replace the egr pressure sensor. Before i go replacing all these parts, i know there are many things that can be causing this. From air filter to coils to catalytic converters. I can literally list 15 possible causes. I just want to know three things. 1. Has anyone had a similar issue after messing with the vacuum lines and fixed it? 2. Does anyone know where to get an actual photo of the vacuum lines so i can see if i switched a hose in the wrong place. And 3. What is everyones opinion about buying these parts for the salvage yard i.e. egr valve, egr pressure sensor, dss sensor etc.... thanks.