1994 Ford Explorer No spark, sudden shut down

II have a 94 explorer that has started to suddenly shut down. The problem had been intermittent until just yesterday while I was returning home. The engine suddenly shut down and would not restart. I did not a bit of hesitation that started before the shutdown. It would stop, then when restarting, it would chug until it got revved up to about 3K rpm. At that point it would seem to run ok.
I had the car towed to a garage where the mechanic measured the fuel pressure at 36 psi. His thought then was no spark. He will be looking around the electrical system today.
I am presently a grad student and do not have a lot of money for repairs or to replace the explorer.
Ted Horn
lyld@iup. Edu