Car random shuts off

I need some help guys. I have a 1990 DA with a b20vtec swap in it. converted to obd1. So my problem is my car randomly shuts off. when I come to a stop and press the clutch she just dies and then will start right back up and run fine. no CEL nothing out of the ordinary. I am stumped. what I did find was that it will run with the coolant temperature sensor unplugged causing the ecu to go into limp mode pretty much.i recalibrated the tps and nothing changes. has anyone seen this before? ive tried different ecu different base map different main relay and she keeps acting up. ive also tried a different coolant temp sensor. if I bring it down to idle slowly it doesn’t die.

Any Help is appreciated Thanks guys!!