Checking induction system integrity

WARNING: This page is about a different car, the 2003 Saab 9-3 and 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Leaking Points In Intake And Inlet System

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Leaks in the intake and inlet system can be detected by spraying starter gas in strategic places. If there is a leak, the engine speed will increase slightly when the starter gas enters the system.

Check the following points for leaks:

gaskets
hoses and hose connections
joints
THROTTLE BODY .