Trouble with replacing the sensors is the sensor itself is not always why the problem is occurring. Wiring to sensor and to ecm can cause problems. Power leads to ecm, grounds to ecm, as well as engine grounds can all cause problems.
Since your problem didn't start until you r&r'd the engine, It might be a good idea to check the engine wiring for bad spots.
If you put car on a scanner that does real time sensor scans, that might give you an idea of what sensor is acting up. Since in today's world, replacing a part is no guarantee that said part is good, I would not rule out sensors that you've replaced.
For wiring diagrams for your 93 try BBB Industries- Premium Alternators, Starters, Power Steering Products
if you pm me with your e-mail address, I'll send you pdf file of sensor readings and what they mean. Also 93 ecm wiring chart.