Neighbor's '06 Sportage w/V6. It's been sitting for a couple months. Had a dead battery and we replaced that today. It will turn over/crank to your hearts delight but will not fire/start. A couple times out of about ten attempts had brief diesel-like stumbles at the end of the crank attempt. There is a raw gas smell in the exhaust, so I think it's getting fuel. (yes, there's gas in the tank). Ideas?