I'm chasing this same problem and thanks to the search I know what I need to do...but damn, I stopped by the dealer today for a DPFE (without the part number in hand) and they wanted $107!!!

Where are you guys getting these things and how much are you paying?

Pacific Green '96 Contour LX V6 â??98 GTP, light mods, 14.66/94 Calypso Green '92 Mustang LX coupe, 13.56/101 Crown Autocross Club 1999 Street Tire Champion, 2000/2001/2002 Street Modified Champion KCR SCCA 2002 Solo II Street Modified Champion