Diagnostic Aids

Inspect for the following conditions:

• Restrictions in the MAP sensor vacuum source.
• MAP sensor seal missing or damaged.
• Vacuum hoses disconnected, damaged, or incorrectly routed.
• Intake manifold vacuum leaks.
• Vacuum leaks at the throttle body.
• Vacuum leaks at the Exhaust Gas Recirculation (EGR) valve flange and pipes.