Why1988 stalls when put in gear runs fine afterward

You can't just unplug the kickstand switch, you have to put a jumper wire in making it think the switch is closed.

Engine stalls or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

You need to run a engine control fault code test on this. Click Here to see how that is done

Sounds like there is a problem with the Torque converter in the transmission or Transmission itself. When you put it in gear it should initially go into neutral but occasionally the transmission will stick part way in gear and partially in neutral putting a load on the motor. It is not enough of a load to get the vehicle moving but it is enough to stall the motor. This could be a simple clutch adjustment in the Automatic clutch to a PCV valve issue to a need to rebuild the whole transmission because of a problem with the control body or transmission pump itself. Sorry for the bad news.

The TCC solenoid in the transmission needs to be replaced. It is under the side cover. It controls the converter to lock up for better fuel mileage. If you want to drive car until you get it fixed you can un-plug the connector going to the transmission on the front of transmission. This will keep it from going to lock up mode and keep it from stalling until you can fix it. Common problem.

pull off the transmission transition switch wire pluged on to tranny
start car drive should be fine never hook op again 0 money
or pay 700 dollars to install a new one
or buy switch pull tranny and install your self

sounds like a electrical problem somewere

You have some kind of sensor bad. Get it checked by a pro ; - )

Runs fine when not put in gear? Sounds like transmission is stuck in "lock-up". Need to go to transmission or full automotive shop for repair. This is not something you want to attempt on your own unless you are experienced with removing valve bodies and solenoids from the inside of transmissions.

Its possible it could be other things causing the problem, but seeing as you've checked most of the likely causes, it is most likely your Torque-Converter. The lockup clutch in your Stator-Fan located inside the Torque-Converter could be siezed, causing the car to stall.