2002 grand marquis wont run with MAF plugged in, replaced with new and reset.

2002 mercury grand marquis and the car wont run with MAF plugged in, replaced with new and reset by disconnecting neg for 30 mins. no codes thrown. runs with it unplugged but dies within seconds of plugging it in. have searched the internet for hours. my search has me thinking egr maybe but thought i would see if someone who knows whats up has any suggestions. much appreciated.