Our 1991 Pontiac Sunbird sat for approx 1 week with out being started. When we went to start it, no luck, it didn't even turn over. We thought maybe the battery was bad and replaced it. Still no luck. We attempted to have it diagnosed but the computer wasn't " talking" to the diagnostic machine SO we then replaced the computer - STILL nothing. Any ideas as what it is? This is a great car and we would love to get it running. Any help you can give would be greatly appreciated. Thank you!