How do you check for a vacuum leak on Pontiac sunfire?

To check for a vacuum leak on a Pontiac Sunfire, start by inspecting all vacuum hoses for cracks, tears, or disconnections. You can also use a smoke test, where smoke is introduced into the intake system to visibly identify leaks. Additionally, listen for hissing sounds while the engine is running, which can indicate a leak. Finally, using a scan tool to read any related trouble codes can help pinpoint issues associated with vacuum leaks.