1988 Mariah 454 PCM
I have internittant starter problems. I turn the key and nothing, most times, then sometimes, it turns over fine and the engine fires properly.
Sometimes I can hold the key in the start and nothing and a few seconds later it starts. Most times turning the key nothing. No clics, nothing.
Replaced the battery twice now,
Rebuilt the starter and solenoid and returned to the overhauler to confirm it is not the starter
Replaced the separate solenoid mounted on the rear of the engine.
All cable terminals have been checked, cleaned and tightened.

What do I check or replace next?
The key. Wiggling it does nothing.
Thoughts?
Long time owner of Supras, first post.