i just got my car back from the body shop, and installed my pcm...everything worked fine for two days, then last night, i was racing my buddy's 02 gtp (3"d/p,cai,3.4 mps,104's,18o tstat,custom tune) and i wqas smokin him...im almost stock right now, except for the pcm...anyway, the check engine light came on, so we scanned it and came back as "running too lean, (bank 1)" i dont remember what exactly the number of the code was...

any ideas? i had the pcm on for three days before the accident and didnt have any problems, but i re-installed the stock unit for when it was in the shop, so i know it wasnt something they did....

PLEASE help me out, because im mighty angry right now and want to know how to fix this...