Re: Engine quits when warmed up. FOUND PROBLEM.
1989, 735i. No. It wasn't cracked battery fuses. I did the stomp test and the oxygen sensor fault code blinked. Changed the sensor and the engine ran almost perfectly. Almost, that is. After engine warmed up I turned it off then started it again. This time it took a bit to get going. Did a second stomp test and the coolant sensor fault code came up. Discovered the sensor was unplugged. Unfortunately it looks like the connector may be broken. Uh Oh. Can you hear me crying?