93 3.1 lumina stalls at idle

my son has a 93 lumina that stalls when at stop signs and at idle but will start back up a run fine it runs fine at crusing speeds any ideas would be great thanks and no service engine lights or any other warning lights come on

youll get lots of responses advising different things. what worked for my 92 lumina when it was stalling at stops signs was STP fuel injector cleaner. you just ad it to your gas tank and it cleans out the fuel injectors but make sure you add it to a full tank or it could be strong enough to eat away some seals.

I will also try that thanks for the reply