i did that with linux and a raspberry pi once.
ncurses interface, cheapo ebay backup camera as a screen (optional).
it worked as soon as you turned the igntion on, added small wifi adaptor and some scripts so it automatically uploaded logs when i parked in my driveway
http://fbodytech.com/misc/raspberry-...arddatalogger/
the software is old but you could probably screw around and make it work?
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