i just got my car back together about a lil over a week ago and i added a typhoon intake,l/t headers with the cams i already had.i also got rid of the egr and blocked off the vacum lines.it keeps throwing 2 egr codes along with muliple misfire,system lean bank 1 and sometimes 2,and cylinder 2,3,4 and today 5 misfire!!!i changed the plugs last week with new double platinum autolites, didnt help so i bout a set of factory motorports and put in it,still having the problems!!!! i never could really feel the miss til today,and the more i drove it the worse it got!!!!i dont know what to do b/c i also changed the coils so ofcourse it didnt help either!i'm about ready to set fire to it!!!!! anyone have any ideas of what it could be??????