Why can't the Ma3 star hatchback suddenly start?

There are several possibilities for this situation.

The first cylinder pressure is insufficient, which leads to the start failure.

Insufficient pressure of the second fuel makes it difficult or impossible to start.

The third throttle is too dirty, which causes the idle metering hole to be blocked, making it difficult or impossible to start, but it is easy to start when stepping on the throttle.

The fourth possibility is that the ignition coil failed to start.

The fifth possibility is that the crankshaft position sensor is damaged and cannot be started.

Sixth, insufficient battery power may cause the starter speed to be insufficient to start.

Seventh, it may be that the starter is damaged and the safety relay of the starter is burnt out, which makes it impossible to start.

The eighth possibility is that the fuel pump is damaged and the fuel pump safety relay is burnt out and cannot be started.

The ninth possibility is that the anti-theft lock won't start.

It is recommended to call 4s for help. I hope I can help you. If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.