I have a 1990 740GL. It has the most basic 2.3 engine, no frills. Yesterday, I backed the car out of the driveway and parked it along the streeet. A few hours later, I went to move it, and it would not start. It cranks, but will not catch. Under the hood it's bone-dry. I checked both of the coil wire ends. Any other ideas? In the past, it has been tricky to start, but never like this. Thanks!