A test light connected across the coil primary leads should flash on + off when engine cranks(coil sparks when 12v turned OFF due to collapse of magnetic field).If you get pulsed 12 volts,and no spark from the coil,the coil is bad.If you don't get the pulsed 12 volts,trace back to find out why(the PCM turns the coil ground on and off,12 volts comes from switched IGN source)
SOURCE: 2003 FORD TAURUS 3.0 VIN S LOST INJECTOR PULSE,
Are you check right fuel pressure to the check valve on the fuel rail, the spark is there, the timing is correct, it cranks over fine? You'll probably need to do some pinpoint checks to see if the drivers are working. Are you scanned the PCM to know exactly what fault code is stored?
Keep in mind that the EDIS ignition will not function without a valid PIP signal. However,
when dealing with computer modules and circuitry, intermittent-type
problems are not all that uncommon, so you can't rule out a component
just because you know that it works properly some of the time.
Keep us updated.
SOURCE: 1995 f150 4.9 no fuel
look at the fuel rail and on the end is a vacumn operated shut off valve on older cars and i suspect that either the vac pipe is perished or the diaphragm inside the vale is perished
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