Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Ignition OFF, disconnect the air intake duct at the throttle body and inspect for the following:
- Throttle valve that is NOT in the rest position
- Throttle valve that is binding open or closed
- Throttle valve that is free to move open or closed WITHOUT spring pressure
- If a condition is found, replace the throttle body assembly.