This morning when I attempted to start my car it appeared as the battery was dead since I was getting no lights, nor crank. Upon checking the battery it appeared as the negative connection on the battery was loose. I tighten up the negative connection on the battery and my car did start up, but now once I hit the gas, the engine feels like its going to stall. It idles OK, but if I hit the gas, the engine stutters a few times, and then it goes back to normal idle. I dont have any cel lights or any other warning lights. It doesnt sound like a coil pack issue since when in idle the engine doesnt sound like its misfiring.