Suggest that you check the EGR passages behind the TB gasket before doing anything else. They seem to get clogged regularly on these cars.
If it's not that, then you can check the EGR valve, DPFE, and EVR.
96 Contour SE
Duratec V6 24-valve 2.5L ATX
108,000 mi.
Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
| 
