I had driven my car about 25 miles and pulled into a gas station to fill up. when i tried to start car to leave it took me 3 times to start the car. This is the first time this has happened. i then drove another 10 miles or so to my destination. after turning the car off, i tried to re-start it again and it did the same thing. on both occasions i was able to start the car by giving it a little gas when turning the key. any thoughts or advice would be appreciated. Thanks.