98 gp stalls out on turnover
 

hey people i got a 98 pontiac grandprix it stalled out 3 times now on seperate occasions and white smoke was commin out of the exhuast. anybody have any ideas on y this is happening. took it to my mechanic n he said that the stalling out and smoking was nothin yea ok he's retarted so can anybody give me some feed back. car would stall out everytime i go to turn it over. i know its not the starter that was replaced recently. i think i might have a fuel delivery problem or my thorttle body needs to b sprayed n cleaned out. well anyway if u guys can help me out i appreciate it