My 89, 735i has been plagued with problems since last Fall. The latest problem is the engine quits after the car warms up. It starts immediately when cold. I drove about 4 or 5 miles and stopped for about a half hour. Car started fine. Drove about 300 yards, stopped at a red light. Turned right on green and the engine quit. The starter turned over fast. The car started hard but the instant I touched the accelerator the engine quit. Tried three more times but no go. Finally had it towed. The same thing happened a while back and the mechanic thought the gas line had ice. Dry gas seemed to work but the trick is that the car starts fine when cold so he thought it was fixed. I didn't drive the car for 3 days then ran into the trouble again as described above. Any ideas greatly appreciated.