It doesn't have EGR
The fuel pump is in the gas tank on a 1999 jeep Cherokee sport.
On a Cherokee the thermostat is under the housing that the upper radiator hose hooks to. On a Grand Cherokee with the 4.7L it is under the lower hose attachment housing.
It is the Positive Crankcase Ventilation (PCV) valve.
I have 1 1999 Dodge Neon Sport and the PCV valve is located on a hose that comes out of the Valve cover. The hose is very brittle (possibly due to heat) and can crack when you try to replace the PCV valve so be prepared to replace the hose, clamps, etc. as well.
2993 lb
20 gallon
1998-2001
The PCV valve is located in the valve cover
Not with out major modifications.
The PCV valve for a 1999 Regal 3.8 is located on the top of the valve cover. The valve pulls out to replace it.
It is either a Cherokee, Grand Cherokee, or Wrangler. The model codes are xj, wj, and tj.
A 1999 Jeep transmission does not have a modulator valve.