92 Sundance enginge stalls

Agree. The coolant temp sensor to the PCM is the 2-wire sensor at the thermostat housing and must be unplugged while setting timing. It will turn on the 'Ck eng' light, but the code can be erased by disconnecting the battery after the timing procedure is completed.
The single (violet) wire temp sensor near the #1 plug is for the dash temp gauge only.
If nothing can be found with the way the engine is running, then the transaxle lock-up torque converter clutch (TCC) may be staying on hydraulically. Unplugging the TCC electrically by the 2-wire plug next to the dipstick may make no difference if the problem is the TCC staying engaged hydraulically from an internal transaxle leak or TCC venting valve restriction at the valve body.
The TCC solenoid gasket on the valve body has a screen to trap debris. If this screen plugs up then the TCC can't vent pressure and it will stay engaged and will cause a stall when put in gear. Or if you are driving, it may lug the engine down to a stall when coming to a stop unless you slip it into neutral.
I have fixed these by simply cleaning the screen, but this may be temporary as the debris is probably clutch lining material and it will accumulate again. This probably means that the transaxle will need a rebuild, cooler flush and reman t/conv soon.

It ran fine until we changed the timing belt the first time, No stalling, no misses. The belt was missing teeth and wouldn't spin the motor, so we replaced it. The new belt caused to much tension on the cam shaft causing it to snap near the gear, and that would be the second timing belt.

After that, it would stall while slowing down, so we thought we were a tooth or two off, removed and adjusted the timing belt for a third time which didn't make a difference, From what I can tell, the alignment was correct, but they give you little to know direction with the timing marks they use.

We then replaced the ignition coil because the car lost all fire, and also the distributor to replace the sensor inside. I had no idea about the coolant sensor, so I will try that this week.

I've also looked at the TCC, but have found no diagram on where it's located, it seemed to fit all of the symptoms though.

Thank you both for replying, Hopefully, I can get the car up and running sometime soon.

EDIT, no fault codes BTW, I'm not sure if thats because the battery has been unplugged while replacing the timing belt or not though.