Manifold Absolute Pressure (Map) Sensor
- Sensor is located on engine or firewall and is connected to intake manifold by a hose. Remove vacuum supply hose to sensor. Install vacuum pump to sensor, and apply 18 in. Hg vacuum. Sensor should hold vacuum.
- Replace sensor if vacuum is not held. Faults in MAP sensor or circuit should set a service code. See QUICK TEST in TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section. If service code has not been set, see SENSOR RANGE CHARTS article in the ENGINE PERFORMANCE section for sensor specifications.