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.