i replaced my mass air flow 2 times and the check eng lght goes off then back on

Hello if it's a 3800 either Vin k or 1 most likely a vacuum leak on the lower intake. There is a vacuum t under the supercharger pull housing on a Vin 1 and on a Vin k also check the back of the upper intake for the rubber plug .above where the booster hose goes in.