How can you tell that the Cruze throttle is broken?

First of all, the broken watch is now:

For example, it cannot be started or does not return to the inside of the throttle after starting; Black smoke, high fuel consumption, high idle speed and uneven acceleration.

These are all signs that the throttle is broken.

Secondly, the electronic throttle is now used to control the transmission of mechanical parts through ECU. Generally, the mechanical part of the throttle is not easy to break, (it is all gear transmission, and ECU controls the forward and reverse rotation of the throttle motor. ) The problem is also the control circuit of the electronic throttle.