94 Transport 3800 idle miss, no take off

My 94 transport misses at an idle, and sometimes will die. And if I floor it, it will not take it, it acts like it is starving for gas, I replace fuel fiter and fuel pump, but this didn't help. Sometimes when I first start it and take off, it will onlly idle along, even tho you press the gas petal down, and after a little bit, it will take and go ok.

These symptoms have been reported frequently. MOst probable options are CPS,EGR,MAF
YOu can peek an eye on these threads:
http://www.automotiveforums.com/vbulletin/showthread.php?t=405404
http://www.automotiveforums.com/vbulletin/showthread.php?t=394305
http://www.automotiveforums.com/vbulletin/showthread.php?t=407310
http://www.automotiveforums.com/vbulletin/showthread.php?t=272620
http://www.automotiveforums.com/vbulletin/showthread.php?t=144387