Contour Enthusiasts Group Archives Forums General Troubleshooting 01 Cougar 2.5 problem

I'm trying to figure out what's going on with my brothers 2.5L Cougar. The CE light is on and I pulled a P0401 code which is insufficient EGR flow. I took off the TB and cleaned the EGR ports. Car has 47k on it and no modifications. The CE light took 80 miles to come back after cleaning. I replaced the fuel filter, changed plugs and wires also. Also at a cruise at about 30-35 at lower RPM's the car seems to be hesitating. I hate to keep throwing parts on this thing. I think I just might have him take it to the stealership. Could the EGR valve have crapped already? Is the MAF making it studder at 30-35 mph w/o any other driveability problems? If the car has a DPFE it's not in the same place as my Contour. Where the heck is it?