This is a Mercury Sable 2001, Vulcan engine 3.0L, Sedan body
The electric of the car functions normally except occasionally, the ignition switch doesn't work properly.
When the key is in the run position, all the accessories work normally.
When the key is in the start position, nothing happens.
I sometimes can turn the key back and forth, and then the switch works normally.
Once started, things are fine.
I replaced the neutral safety switch, and nothing changed. This was some months ago.
Later I changed the electrical part of the ignition switch, the part under the column on the left (driver's POV)
Still, the problem recured occasionally
Since the car usually starts with playing with the key, I just lived with the problem. Now, it seems to have gotten worse.
When the problem did occur once, I jumped the starter, and it turned over properly, but the engine didn't start.
To make the repair difficult, I can't cause the problem at will. Usually, everything will work fine.
So, what's my next troubleshooting step? Should I just change the ignition switch again? Ideas?