1993 2.3l uses a Crank Sensor and ICM(ignition control module) so there is no Spark Timing adjustment, no distributor
So there is no use for a SPOUT connector(it's there from the older system), it always needs to be connected, which is why previous own used it for a "kill switch"
Leave the pink wire(SPOUT) disconnected if engine runs that way, and use a timing light to check current spark timing at idle, should be about 12deg BTDC without the Pink wire connected
Without the SPOUT signal the engine should be slow to REV and stumble on acceleration
SPOUT is the "Vacuum Advance" for electronic ignitions, changes spark timing when you press down on gas pedal
Without this signal the ICM just has RPM spark advance, think Model T and the spark advance lever on steering wheel, lol
The 1989 to 1994 ICMs on the 2.3l were known issues, they do run hot, they are also grounded by the 3 screws/bolts that hold them to the lower intake and these screws get rusty so poor ground and poor running
The problem could be the ICM's internal circuit for the pink wire............or a long shot and its a computer issue
Wiring here for your system:
https://www.therangerstation.com/tech_library/EDiagrams/files/Diagram_Ignitionsystem_1990_2_3.JPG