Q: A BMW mini that I received for repair occasionally cannot start. After a few minutes, I tried again and the vehicle could start. As long as the vehicle starts, the acceleration is normal, and the idle speed does not shake, what is going on?
A: According to your description, it may be a problem with the oil pump or the oil pump relay. Once the vehicle is difficult to start, you can turn on the start switch first, turn it off after 2s, and then turn it on again for 2s, repeat this 3 times and then start the vehicle. If the vehicle can start easily after this operation, replace the electric gasoline pump, otherwise just replace the main control (oil pump) relay to eliminate the fault.