the "valve" stem fitting you're referring to is called a schraeder valve , and is for connecting a fuel pressure gauge to, as a means of checking your fuel pressure-typical fuel pressure should be about 35 psi.
The 1998 Ram does not have EGR.
2001 Dodge Rams do not have Egr valves.
94-98.5 dodge cummins 12 valve
Inside the transmission, on the valve body. It is the one with the long wiring pigtail on it.
Schroeder valve.
It is either screwed into the pressure line on the side of the transmission, or it is inside on the valve body.
A 1997 Ram does not have EGR.A 1997 Ram does not have EGR.
the idle control valve on a 318 is on the back side of the throttle body. Held on by two torqs screws.
Inside the transmission, on the valve body. It is the part with the long wiring pigtail.
I dont believe there is a modulator valve on a 75 truck, and im sorry if some joker ripped you off, but dodge transmisions are always fun, I feel for you.
It is in the valve cover.
smack in the middle of the valve cover