[SoCal Driver]

First the fuel pump should not be running with the key on. Runs only when cranking the engine and after the engine starts.

Second even IF you hot wire the fuel pump (aux fuse 2 to 3) fuel does not come out of the injectors unless there is fuel pressure AND you are cranking the engine AND the DME is getting current AND the reference sensor is working.

You "crank" the engine by using the starter. Either the engine starts or does not start. Need to be clear on this.

When a 944 sits for a year you need to flush the fuel system and replace the fuel filter. You can do this by running the fuel pump with the jumper across the two fuses. IF the fuel pump runs, most are varnished up from sitting, all of the sediment in the tank will be trapped in the fuel filter. You will need to replace the fuel filter.

If the fuel pressure regulator and/or damper is shot you may get too much pressure in the fuel rail or not enough. It's usually too much. This will hold the injectors closed. Also the fine sediments will clog the inlet wire mesh filters on the injectors. Back flushing the injectors with solvent and shop air will clear them.

Still first things first: Turn the key on and check for battery voltage at the coil (black wire) and at one of the injector connectors. If there is no voltage at the coil then the ignition switch is bad. If there is voltage at the coil but not at the injector then the DME relay is acting up. If there is voltage at both you need to pull a spark plug wire, stick a spark plug in it, lay the plug on the intake manifold and crank the engine looking for spark across the plug gap.

No spark check that the rotor is turning, the HV cable from the dist to the coil is good (comes loose inside the weather boots) and that the plug wire you used is good. Pull the spark plug wire out of the dist cap and stick it in the coil and crank the engine again. If you have spark then pull the dist. cap and look for a loose rotor or a broken timing belt.

Another reason for no spark is the reference sensor (front one of the two) is not seeing the pin on the flywheel or if it is sensing the pin the DME is not responding to it's signal. There are a few places inside the DME where the solder joints crack and separate -- one is the large transistor that triggers (grounds) the coil. Could be that the sensor is out of adjustment or is damaged; bad connector or has hit the pin on the flywheel or even hit the pin and bent or broken it off. Most find that the connector is loose or corroded or cracked or all of the above.

If you do get it started replace the timing and balance belts ASAP. Especially if you have no idea when they were last replaced.