I have a 98 GTP (Daytona) with 105K, 3800 II supercharged. This is an electrical issue I have had for some time, but lately the car has shout off on the road. I always turn the ignition key and wait until the fuel pump stops before starting. During this time, if the radio is on, door buzzer, or I try to open a window, everything will shut off for a second. I read a post like this months ago and can't find it, but the same issue.
Any ideas?
Joe

Sounds like your ignition switch is possibly going bad.