I have recently purchased a resistor chip from Ebay (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2414173684&category=33597) which claims that "it will modify my AIR/Fuel ratio and slightly change my engine timing to run stronger and with increased power" for 6 bucks. It basically into the IAT tube and do its job. Have anyone installed similar things before? It's because I have heard from my car mods shop that it can damage the car. Please give me advises!!! Thx!