Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2010MOUNTAINEER 2WD V8-4.6LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSMANIFOLD PRESSURE/VACUUM SENSORDESCRIPTION AND OPERATION
2010 Mercury Mountaineer 2WD V8-4.6L
Manifold Pressure/Vacuum Sensor: Description and Operation
2010 Mercury Mountaineer 2WD V8-4.6LSECTION Description and Operation
ENGINE CONTROL COMPONENTS
Manifold Absolute Pressure (MAP) Sensor
The MAP sensor measures intake manifold absolute pressure. The PCM uses information from the MAP sensor to measure how much exhaust gas is introduced into the intake manifold.
The MAP sensor for speed density control systems is centrally located on the intake manifold. The MAP sensor measures the intake manifold pressure. The powertrain control module (PCM) uses the information from the MAP sensor to determine the speed density air charge and provide input used for various spark control functions. The MAP sensor for a speed density system is integral with the intake air temperature 2 (IAT2) sensor.
Manifold Absolute Pressure (MAP) Sensor
The MAP sensor measures intake manifold absolute pressure. The PCM uses information from the MAP sensor to measure how much exhaust gas is introduced into the intake manifold.
The MAP sensor for speed density control systems is centrally located on the intake manifold. The MAP sensor measures the intake manifold pressure. The powertrain control module (PCM) uses the information from the MAP sensor to determine the speed density air charge and provide input used for various spark control functions. The MAP sensor for a speed density system is integral with the intake air temperature 2 (IAT2) sensor.
Typical MAP Sensor:
Typical MAP Sensor Integrated With An IAT2 Sensor:
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.