I had an erratic stalling issue with my 2000 Vulcan, theft light would flash and motor would stall. I could always restart and drive. Theft light flashing threw me off for a long time. Problem got worse with time. Would be worse when engine was hotter. I thought about it a good while. First part I replaced was the relay for the PCM at the front of the engine compartment. This conclusively fixed the problem. 2000 Taurus is now running great again and fun to drive. Little square black part cost $14 from dealer. Dealer said he sold a lot of them. Possibly my best, cheapest, easiest fix ever.