Is this an Auction? Price going up ... ?
Was dropped to $400 and had a buyer and then it went up. Don't understand.
Your prerogative I guess.GLWS
Personally I'd have taken the $400
Sometimes when the 4wd light comes on randomly it can be the Attessa Accumulator above the rear diff (Nitrogen canister).
They are 25yrs old and empty/fail which can cause random issues like yours.
Just a thought as replacing mine made a hell of a difference.
And resolved my issue with the 4wd/abs light randomly coming on which is annoying.
However the major improvement was engaging the 4wd system itself.
My experience is using a Trickle charger is fine.
In my case If I disconnect the battery the mongoose alarm goes off.
So I leave both terminals connected while charging.
Generally only connect it up if I'm leaving the GTR in situ for over a few weeks.
More thoughts. Check all your IC piping is on and secure. That can cause the car to stop
as for your oil pressure gauge reading 0 I still believe that is unrelated to your FMIC install.
Hopefully it's your 1. Sender, 2 Gauge, or 3 she's f**ked !
R32 GTSt's generally the sender ....
$165 from Kudos
Edit:
Nothing to do with the FMIC.
If your engine has died twice while driving you have issues