My daughters 2004 Pontiac Sunbird with the 2.2 ocassionaly wont start. She said when this no start condition happens the car turns over but sounds funny. It idles and runs out great. I have heard it hot and cold start and it started rite up every time. Her friend that heard the car when it wouldnt start said it sounded like a timing belt issue?? Any ideas?? If it were a timing belt issue wouldnt it do it all the time? Is there any way of checking the timing belt?