Manifold Absolute Pressure (Map) Sensor
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford Econoline, 1995 Ford Club Wagon, and 1995 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Sensor is located on engine or firewall and is connected to intake manifold by a vacuum supply hose. Remove vacuum supply hose to sensor. Install vacuum pump and apply 18 in. Hg vacuum to sensor. Sensor should hold vacuum. If sensor does not hold vacuum, replace sensor. Faults in MAP sensor or circuit should set a diagnostic trouble code. See QUICK TEST in TESTS W/CODES - EEC-IV (4.9L) article. If no diagnostic trouble code has been set, see CIRCUIT TEST DF in TESTS W/CODES - EEC-IV (4.9L) article for additional sensor testing and specifications.