hi , I have a 98 buick park ave and Im having issues with it turning off while driving .. when I press the gas after the car gets hot it begins to stutter then eventually turns off , Ive spoken to a couple people one mechanic says it was my coil pack (my car doesn't have a distributor) so I bought all 3 coil packs .. still turns off so I spoke to another mechanic he says my control module if its not that what else could it be ?????????? helpppppppppppp