Emissions box is the Feedback carburetor system (FBC)

some numbers for checking
Throttle position sensor
output voltage
2.4 L engine - 0.28 to 0.52v
3.0L engine - 0.4 to 1.0 V
resistance (at closed throttle) 3.5 to 44 ohms

egr control solenoid valve resistance 36 to 44 ohms

engine coolant temp sensor resistance
32F - 5.9 k-ohm
68 - 2.5 k-ohms
104 - 1.1 k-ohms
176F 0.3 k-ohms

motor position sensor resistance (2.4l models)
4 to 6 k-ohms

oxygen sensor output voltage
1990 2.4L models 1 volt
1991 2.4 and all 3.0L models 0.6 to 1 volt

purge control solenoid valve resistance
36 to 44 ohms at 68F