...sudden the car started to lop and? die when i tried starting it back it wouldn't even run at all. The shop said they didn't know why it wouldn't run becase it had everything in place to run. Let me add that i had my stereo hooked up at the time to the positive post right next to the fuse box under the hood. I don't know if this had anything to do with the car not starting. relays and fuses are working fine so i'm stuck.