Its a total scam. Its a 23 cent resistor that fools the computer to change the fuel curve, which in turn runs the engine rich and wastes gas. Sorry. 
Here's a thread on these. Get your money back.
http://www.clubarmada.com/forums/showthread.php?t=1002&highlight=resistor
Here's a thread on these. Get your money back.
http://www.clubarmada.com/forums/showthread.php?t=1002&highlight=resistor