Diagnostic Aids

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for a condition in which the throttle valve may have been held open.
Inspect for conditions in which ice may have formed in the throttle bore.
The throttle valve is spring loaded to a slightly open position. The throttle valve should be open approximately 2-5 percent. This is referred to as the rest position. The throttle valve should not be completely closed, nor should the throttle valve be open any more than the specified amount. The throttle valve should move open and to the closed position without binding under normal spring pressure. The throttle should NOT be free to move open or closed WITHOUT spring pressure. Replace the throttle body if any of these conditions are found.
For an intermittent condition, refer to Intermittent Conditions .