I have a 90 bronco that I use as a snow plow. I’ve been having trouble with it starting. After sitting all summer I charged the battery and tried to start it. It started right up. Tried it again and it fired right up. Tried again and now won’t start. It has fuel and spark but sputters really bad while cranking. If I take the rotor out of the distributor it will crank freely as it should. I’m baffled. Any ideas?