Re: EGR valve!?!
Most engines since the 70s have EGR valves. Yours should be right next to the throttle body. It looks like a spaceship with a vacuum hose coming off the top.
2004 XLT 4.0 4x4, 3" PA body lift, 32" BFG M/Ts, Dick Cepek DC-2 wheels, Euro tailights, self-painted headlight mod, NAV/DVD/XM/iPod stereo (Pioneer AVIC-D3), Line-X, Westin step bars, AVS bug shield and window vents