Finding the EGR valve location is not usually a difficult task. All the EGR valves have two things in common: They are all shaped like a flying saucer on a pedestal and they are all somewhere on the intake manifold. Some have sensors on the top yet the lower diaphragm remains the same.
Many valves will have a metal pipe from the exhaust system leading up to them to feed the exhaust gases into the EGR. This will be a relatively large pipe usually ½-inch to 5/8-inch in diameter. This is not common to all valves however, as some pick up the exhaust gases through a separate chamber in the intake manifold.
Some vehicles have the EGR valve located in the rear of the intake manifold. Look just to the driver's side of the distributor or in the center rear if there is no distributor. The EGR will be near the firewall and the pipe can be seen coming up from the exhaust with the pipe attached to the EGR between the valve and the firewall.
Many of the older, early model vehicles have the EGR valve located on the passenger side of the manifold midway up and close to the valve cover. These are carbureted vehicles for the most part. They sit on a flat platform on the manifold.
Many of the late model vehicles with fuel injection have the EGR valve located just behind the throttle body and situated horizontally.
Most all the EGR valves, with the exception of the electrically operated, will have at least one vacuum line from its modulating source to the diaphragm on the EGR. Foreign vehicles such as Honda may have multiple hoses attached to the valve. It is important that these hoses be marked for removal so they can be re-installed in the same position.
If difficulty is encountered in locating the EGR valve, just follow all the vacuum lines, which are few in number and one of them will lead to the EGR.