[shorod]

So from your comments it sounds like the engine cranks fine when it won't start, but for some reason it's not getting sufficient fuel since once you spray starting fluid into the throttle body it starts.

The first thing I'd try is holding the throttle slightly open when cranking the engine. If that works then your Idle Air Control (IAC) may either not be working properly or the passages may be restricted.

If that has no effect then I'd probably check the Engine Coolant Temperature (ECT) sensor. The PCM uses information from the ECT at start up to alter the fuel metering to accommodate the engine temperature.

Fuel pumps tend to exhibit symptoms more at high temperatures than low temperatures. But, if you have access to a fuel pressure gauge knowing what the fuel pressure is would be good information. For these symptoms you may not want to take the car to a dealer. You can get better labor rates by taking it to a trusted independent shop, the systems involved with your symptoms are really not special to Lincoln.

-Rod