Why does your 1998 Buick Regal cuts off?

Honestly though alot of research online and personal experience it seems that on this particular vehicle theres a turn signal switch malfunction that conflicts with the ignition switch on the steering column whenever you hit your left turn signal...ie, you need to replace your ignition switch. there are also alot of other variations of what this problem can consist of, such as: relays, fuses, ignition control module located underneath your ignition coils, your battery, etc etc...also you have a set of keys that have the dual sided chip imbeded (PASS II) and your security light is on or was on, then the system is preventing the computer from allowing it to let any fuel through the system and thus preventing it from starting...alot of applications are considered with this problem and should be handled obviously from the least expensive such as your fuses or relays being checked....then youll start to have to deal with real money as parts start to range from about $90 for you ignition switch, all the way to $290 for the module that resides underneath the hood....however if you have the coin, an overpriced dealership will be glad to burn a hole into your pockets for replacement parts and the extensive labor to pinpoint the exact cause for your problem...

hope that helped...