Chevy S-10 fuel system trouble

I have a Chevy s10. It's been sitting for about a year and we just started driving it again. It has been running pretty well, considering it has nearly 300,000 miles on it, for about two weeks but all of a sudden it won't start. It turns over but doesn't appear to be getting any fuel. Besides the obvious check and change the fuel filter is there anything else I should I should check and/or replace before I go so far as to pull the fuel tank to check and/or replace the fuel pump? It is a 4.3 liter-fuel injected. Also have been having a bit of trouble keeping it idling when cold. Once it warms up it seems to run fine. Is there a sensor that I should replace, something that's part of the emissions system maybe? I don't have a bunch of money to be buying parts and sensors that I really don't need to replace so some advice would be greatly appreciated. Thank you