94 Mercury Grand Marque, same as Crown Vic fails to start.

Every couple of days engine fails to start. No spark from either electronic coil. Blamed the $200 Ignition Control Module, as car will start if module is unplugged for 10 minutes, then plugged back in. Module
replacement did not repair the problem. Still appears to be losing power to module, or out of module. Oil ok! In Park OK! What else will do this?
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On Tue, 26 Apr 2005 00:54:07 GMT, "Grey Beard"

Don't forget the cheap things in that circuit like the crank and cam position sensors. Since it appears to be intermittent (biggest four letter word in the dictionary), it may also be a wire harness problem. The wiggle test at every connection while connected to an anolog meter or test light may be in order. If you do this, be sure to disconnect the harness from the PCM to prevent any problems there. Unplugging and reconnecting may be a tip on where the problem is located.
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Try unplugging & plugging back in the Crank Position Sensor ; if it starts then, it's probably a corroded connection. Clean connectors (or replace sensor) and coat mating contacts with silicone dielectric tune-up grease prior to reconnection.
Grey Beard wrote:

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