Could you have contaminated gas? Poor quality gas would make an engine hard to start. Perhaps disable the ignition and put the fuel line into a large glass jar, let fuel squirt into the jar and see if you have "water" in the fuel. Disabling the ignition will set a Check Engine Light do you have a scan tool to turn off the light. Perhaps charge and test the battery to ensure it is OK and will see you through the winter.
I would suspect a fuel pressure problem. Did the vehicle sit for any period of time (1 month or longer) in our desert heat fuel can turn bad very quickly - many times when a vehicle sits with very low fuel in the tank the fuel will turn to varnish and cause issues with the in-tank fuel pump.
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