Keeps throwing EST code runs great then quits like you shut it off then gets no spark for 10 - 15 minutes then starts and runs fine until next time. Replace every ignition componet.

Where is the coolant temperature sensor located on a 1993 oldsmobile cutlass ciera 3.3 v6

Did you replace the computer (you said you replaced every ignition component which means the coil packs, ignition coil module, crank sensor, etc.)

Replace the crankshaft position sensor, it will cure the problem.