Car Wont Start Sometimes, happened 3 times in the last... 3 months last two times less than a two weeks of each other

Starter motor solenoid faulty

sounds like a problem with the ignition control switch. get it check out by a mechanic .

Have you cleaned the MAF sensor? I'd do that next. Ford should be able to find that problem though with a diagnostic.
Some dealers have good service and repair.....others not too good. don-ohio

your autnater or somting is staying on

You didnt list the type of car this is, the most common thing that causes this is the starter, i just had a saturn, the customer had the same problem we told her it may be the starter but cant be 100% sure until it actted up, she didnt want to replace it unless we were sure, so we kept and drove the car around for 5 days and finally the last day it didnt start and it was the starter , same problem turn key and nothing no noise and no start, i would have the starter replaced and go from there, its a mater of time before the car just wont start,hope this is helpful.

yea agree but first listen when u turn the key, if the fuel pump makes some noise it means u have a problem with the starter! if no sound from the pump (sound should comes from the back seats) then its pump!

engine coolant temperature (ECT) sensor

A code P0118 may mean that one or more of the following has happened:

• A bad connection at the sensor
• An open in the ground circuit between the ECT sensor and the PCM
• A short in the voltage feed between the sensor and the PCM
• A bad PCM (less likely)
• A bad temperature sensor (shorted internally)

info taken from http://www.obd-codes.com/p0118

Do you have the 4.3L engine with spider fuel system? That system is noted for problems. Key on engine off, fuel pressure, 60--66 psi, use a fuel pressure gage. It needs that pressure to start, after it starts, it will run with less pressure.
There could be other issues? Engine cranking, you have spark at the plugs and fuel injector pulse?

did you check the starter

Could be a fuel pump that is going bad. Some times when fuel pumps go bad they cavitate and pump not just gas but also air. If you get too much air in the line and not enough gas the car won't start. Have a mechanic check your fuel line pressure.