No fuel No fire at same time

I'm working on a 85 325e BMW and the owner drove it for a little while set it down and later, maybe a month or two, went back to start it, it would not start but cranked over and over. But there was no fuel when the gas line was loosed and also there was no fire from any of the spark plugs and neither was there fire at the coil. What could cause both the fuel and fire to go at the same time. Every now and then it would start and run find. Could the main relay cause this or could it be the computer? Have anyone else experience this problem? And what can I possibly do to find the problem?

It could be a computer problem or electrical power supply problem. Since you said it was setting I would first look into possible corrosion of the electrical.