fuel pressure wont affect the spark, you only have 3 parts to really look at, there is a pickup module in the distributer, that sends a signal to the amplifier module, and then to the coil. Check at the ignition coil the red/light green wire, with test light with ign on should be 12v, then put the test light on the tan/yellow, have someone crank the engine and the light should flicker.. if it flickers, and you have 12v to the coil, and still no spark replace the ign coil.. I will check back here and see how you made out.. if we have to go farther into it