I bought this 2007 Pontiac Grand Prix, from a neighbor? It had 174,000 kilometers on it when I bought it. Now after nearly 3 years of driving it now was 213,000 kilometers on it. The problem is I started it up and drive to the nearby store which is maybe 5 minute drive from my house. I turned the engine off, and I am maybe in the store for a few minutes. I come back out to restart the car, and after the first turn over the engine sputters and, dies. I try to start it again, and after the second or third try, the engine finally starts up. I have tried changing numerous sensors and even the ignition coils and nothing. If I let the car warm up for 5 to 15 minutes it is fine. It only started doing this recently. Any suggestions for a fix on this would be greatly appreciated.