Hello all. I have a 2000 Contour with the 2.0L 4cyl automatic. I just got a check engine light coming on and I checked the code. It is this crazy P0171 code. I checked for vacuum leaks using propane and could not find any (propane is sooo much cleaner than using carb clean). My car has new plugs, wires, coil pack, timing belt/ belt tensioners, MAF sensor, engine coolant temp sensor and o2 sensors. All of these were replaced within the last 15k miles due to other problems. I have not changed the pcv valve yet...any suggestions on how to do this since it is such a tight spot?? Any suggestions on the next step to solve this code problem?? Thanks in advance!!