Test NTC-8A - Checking Map Sensor
NOTE:
Perform TEST TC-118A - FUEL SYSTEM RICH , TEST TC-119A - FUEL SYSTEM LEAN , TEST NTC-1A - NO TROUBLE CODE TEST MENU or TEST NTC-7A - CHECKING THROTTLE POSITION SENSOR CALIBRATION
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- Ensure engine is off. Install vacuum "T" fitting and vacuum gauge at vacuum source on intake manifold. Start engine and allow engine to idle. If engine will not idle, maintain a constant RPM above idle.
- Note engine vacuum on vacuum gauge. Using scan tool, read MAP sensor vacuum.
- If MAP sensor vacuum is not within one in. Hg of engine vacuum on vacuum gauge, replace MAP sensor. See Fig 1. Perform TEST VER-2A - ROAD TEST VERIFICATION . If MAP sensor vacuum is within one in. Hg of engine vacuum on vacuum gauge, MAP sensor is operating properly. Test is complete.