In 2005, Chevrolet copaci's accelerator level was low.

You need to check according to the following steps.

1. Check whether the accelerator cable is stuck.

2. Clamp the auxiliary hose and observe the idle speed. If not, check whether the throttle can be closed and whether the idle air passage is blocked.

3. Unplug the harness plug of the throttle position sensor, and measure the conduction between the idle contact and the full-load contact with a multimeter.