car stalls when cornering or slowing down in traffic on 1996 Ford Mustang

the car will die when ever I take a corner or at times when I'm in a line of traffic slowing down for a traffic light or just in a slow line of traffic. I just had to have new lower intake gaskets put on due to a blown lower intake gasket at the water port on the lower intake this is when I started to notice this problem it has me and my father stumped as to what could be the cause.

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2 answers
Take it back to the intake gasket installer to be checked out. Light on? No 2.3 in this year model, what engine you got??
Lower intake gaskets on a 2.3 ?