its a pink box that its wired to the stock ecu it also has a serial cable and a sticker with this on it

Mazda III Rx7 1-3-2000
batch cx14_m1/mzrx7 Pink7

i want to know what it does and how to program or reprogram i will take pics tomorrow when theres some light out

 

It's the Peter Ferrell Supercars PFS Purple ECU (aka, the "Purple Motor Eater")

Like the one pictured in this thread, right?
http://www.nopistons.com/showthread.php?t=31310

More info here:

PFS PMC Installation and Tuning
http://www.fd3s.net/pfs_pmc_install.html

Or search the forum, there are a few threads. Save yourself some time and order a Power FC. Not many fans of the PFS ECU these days...

 

OMG thanks yea its the same thing. do you know is there a software to tune it.