The Carchip is a $139 product that reads out all the seekrit info that your car's diagnostic system normally only makes available to service personnel.
The Carchip works with most foreign and domestic cars made since 1996. It installs quickly by simply plugging into your car's onboard diagnostic (OBD) system II connector, which in most cases is under your steering wheel. (It's OK. We didn't realize it had been there all along either.) Once installed, it will blink to let you know it's working.
While you drive, it logs data including your speed, how hard you hit your breaks, throttle position, fuel pressure, and a whole lot more. When you've finished your drive, simply unplug the Carchip from your car and connect it to your computer. The software imports the data and — here's the best part — presents it in a very readable format.
(via Robot Wisdom)
