You can do some checks of the PCM on your own but for most of them the engine needs to be running. The testing procedure to isolate a problem in a system that interfaces with the PCM is about 2 pages long in the Haynes manual. The magnitude of the testing that needs to be done and the lack of specialized equipment is why I'm suggesting we keep to simple checks of the fuel pump circuit. Checking relays, fuses, looking for voltages at all the connectors that carry the power that feeds the fuel pump starting at the pump and working back twords the PCM. Hopefully that will identify the acutal problem or at least point to a general area. Hopefully if we do that we can fix it or at least know the general area that needs to be checked this way you might be able to get the car into an indy shop and tell them the problem is in a certain general area rather than just saying, "my fuel pump doesn't work." Since you've already done the bulk of the troubleshooting yourself you might be able to save some cash.

If your fuel pump worked when you turned the key on then the search would be fairly quick, but if the pump doesn't work when you turn the key on, the list grows to about as long as your arm of things that could be wrong.

For the home mechanic it will take a long time to test for faults in any system that interfaces with the PCM. A ford dealer will probably have on site or at least be obtainable to them the testing equipment that would do literally days of manual testing in a matter of minutes.

The starter has been easy to test with simple equipment becasue first, the system doesn't interface with the PCM. Second, the circuitry is simple and consists of mechanical switches, relays, fuses, a solenoid, one transisorized circuit (PATS) and a diode.

I hope you understand that I'm not trying to be-little or discourage you, its just that I want to make sure you understand that trying to find out why the fuel pump isn't running could end up being a long process that makes the starter problem we're looking into seem like a walk in the park. At the same time, be optimistic that the reason the fuel pump isn't working could be something simple like a bad relay, a loose connection or the pump is just at the end of its life.


I feel sorry for the people who don't drink. When they wake up in the morning, thats the best they're going to feel all day - former President Lyndon B. Johnson