The engine computer is behind the battery. The transmission computer is under the hood on the passenger side.
Chrysler does not use inertia/reset switches.
check the dimmer dial or the fuse
You will need to remove the fan and check for debris in it.
No, a 1991 Chrysler New Yorker does not have chip key.
I had a 1983 and a 87 some parts were interchangeable
Remove the valve cover and look for a loose or broken part.
206.7"
Your relay sensor is likely faulty
10w30
Try nada.com
Did not make a fifth ave. since 1993
Change idle speed contol sensor Uncool the battery for five minutes to reset the computer.