You will be able to control Air/Fuel ratios with it. You can upload air/fuel tables or 'maps' into the unit using a serial cable. Most people have best luck with a USB to serial adapter. There are some air/fuel tables online that you can download. The car will run much better.
There is an install thread around here somewhere, that shows you how to connect the 5 wires that are required. Its easy if you know how to solder.
There is an install thread around here somewhere, that shows you how to connect the 5 wires that are required. Its easy if you know how to solder.