Hi Shorod, on 02/06/2007 you responded to a thread requesting help to diagnose the cause of P0171 and P0174 codes on a 2000 Ford Duratec Engine. You told the individual to send you a private message and you would send a PDF file containing the Troubleshooting Procedures for diagnosing aforementioned codes. If you still have those procedures I would greatly appreciate it if you would send them to
gdy1000@sbcglobal.net. Also, I did a smoke test on the engine and the only smoke which escaped came from the vents on the underside of the EGR valve. Is this normal? Does it mean the EGR valve is bad. Thanks for your help.