Checking Manifold Absolute Pressure (Map) Sensor Calibration

Turn engine off. Install vacuum "T" in MAP sensor vacuum hose. Install vacuum gauge. Start engine, and let it idle. If engine will not idle maintain a constant engine speed above idle, use scan tool to read MAP sensor vacuum. If reading is within one in. Hg of vacuum gauge reading, MAP sensor is functioning properly. Test is complete. If reading is not within one in. Hg of vacuum gauge reading, replace MAP sensor. Perform TEST VER-2 .