just put a gtir motor into my 95 200sx Se-r. tranny was cracked so was just getting it changed at a local shop. exhaust sounded a little funny so when we pulled off the downpipe the cat was actually melted into a bunch of small peices. pulled the plugs look pretty much white. so i guess the things been running very lean. the pyrometer has been floating between 1200 - 1600. the computer is the stock gtir and we set the boost at 10 psi. figured that would be fine. im just wondering why it would be running so lean. any sugestions would be much appriciated. and sorry if this is a stupid question, im just new to this stuff.