[DJ-of-E]

Did you pull the ignitor and fuel pump fuse while the car is still running? You wanna short your car? I don't know why people do these bone-head electrical things, it may work, but you're chancing it anyway you can.

When your start, does it turn? Did you check if there's spark on the spark plugs? If you smell fuel, is it from engine bay or exhaust. If engine bay, check for leak in fuel lines/pump/injectors.

Seriously, no need to ask these sort of questions. The KA is nearly as basic as it can get as a car: AIR, FUEL, SPARK...done.

You need to explain what you mean by "When I bought the car, it started fine. Idle jumped a bit, but ran ok." I usually just say "engine runs consistently with no jumps on the timing. I didn't smell smoke or fuel in the back."