It was behind the glovebox, with the fuses and relays. Was not bolted anywhere.. just lose hanging by the mess of cables.
Car starts fine without it too, no check engine light. It has a pot/variable resistor on the box that I accidently turned..
Pictures:
The chip is a hex buffer/inverter logic chip, had a sticker MCE5866 over it..
Is this some kind of ebay performance mod?