A 1998 Jeep Wrangler does not have EGR.
It doesn't have an egr valve.
Looking at the front of the motor, the egr valve is located on the right lower side of the carburetor.
Back of valve cover on pass side rite below heater hoses
According to Alldata the 4.0L engine is not equipped with an EGR Valve. You don't have one on the 4.0
A 1997 Jeep does not have EGR
EGR Valve Sensor....
It does no have one.
It is not equipped with an EGR valve.
The 1986 Jeep Comanche EGR valve is located on the outside of the air cleaner housing. The valve can be found on the back of the housing.