Hi guys! Does any body has any info on that gforce chip?
I have a 2002 f150 supercrew 4x4 with a 5.4lt.

 

If you search around you'll find it is a $.01 resistor in a box from radio shack. It interferes with the MAF signal, basically making rich a/f times richer and conversely lean a/f leaner. More chance for harm and does no good. Chips in general are out for PCM controlled motors. Be leery of "chips" with outlandish claims. Programmers are the only safe and effective way to make more power. If you want a programmer here are a few good places to start:
http://www.powerhungryperformance.com/
http://forum.gopowerhungry.com/
http://www.troyerperformance.com/cgi-bin/ppistore.pl
http://www.vmptuning.com/store/index.php?
http://www.5startuning.com/