Hi,

You could have had a simple ignition or air leak problem but messing with the AMM while it was running, sure as heck, isn't something that you should have been doing!
I think you should put the AMM in the category with Alternators and not disconnect a battery while it's running.

Luckily since you have spare meters and as long as the last three numerals match, you have saved your bacon!

You mention a PSM? Is that the gadget behind the battery that fires the ignition?
I assume you know about service it.
Have you checked for power, with a small test light, off the orange wire in the AMM.
This will let you see that the CPS side on outwards is working


Since you were dancing around with the AMM connector, maybe you wiggled a problem, in the area of the fuel injection fuse holder.
I think this year car still has one but definitely check the battery wire off the positive post and a connection block on the fender.
That wire feeds the inside fuse panel, of which, can have corrosion problems of it own, down there in the salt air of Florida. Salty humidity can cover that whole state from three directions.

As far as no limp mode, you may have not tripped it on.
This car has some capabilities of adapting or definitely self-tuning.

If you are confused, just think about it being the same way for the ECU.
The AMM isn't supposed to be totally missing "after" its running?
Engineers don't write operational programs for the near impossible happening!
You can tell this worries me!

You might try doing a hard reset.
This means taking the battery cables totally off the battery an holding them together for about 15 seconds.
Lots of cars have gone to this "catch or clear it all" method since there are so many components holding residual power for their circuit memories.


Good luck hunting.

Phil