The EGR valve on a 1979 F150 with a 302 is located in the center of the engine. It is close to the firewall.
PCV Valve is located on the Right Valve Cover.
The EGR valve, on a 2004 Ford F150 5.4 liter engine, is located on the top of the engine near the back. The valve is difficult to identify without prior mechanical knowledge.
The Internet.
Take it to a garage.
The EGR valve is located in the center of the engine on a F150 Lariat 5.4 liter. It is near the firewall.
On a straight six carbureted f150, the EGR valve is located beneath the Carburetor. The carburetor sits on a part I call the EGR plate. The EGR valve is attached to this place at the end. The EGR Valve is a round metal piece that kinda looks like a flying saucer. It will be on the left side of the engine. This should help http://www.ford-trucks.com/forums/869124-1985-f150-6-300-a-2.html
it is part of the egr valve
Try cleaning the Intake Manifold where the EGR valve is attached.
might be the EGR VALVE insufficient flow
The EGr is located next to the fire wall, next to the valve cover on the drivers side of te engine. good luck
Could be the egr valve, low spark, bad seal on the intake