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Mass Airflow Sensor Operation The Mass Airflow (MAF) sensor directly measures the mass of air being drawn into the engine. The sensor output is used to calculate injector pulse width. The (MAF) sensor is what is referred to as a "hot-wire sensor". The sensor uses a thin platinum wire filament, wound on a ceramic bobbin and coated with glass, that is heated to 200*C (417*F) above the ambient air temperature and subjected to the intake airflow stream. A "cold-wire" is used inside the (MAF) sensor to determine the ambient air temperature. Battery voltage from the EEC power relay, and a reference signal and a ground signal from the PCM are supplies to the (MAF) sensor. The sensor returns a signal proportionate to the current flow required to keep the "hot-wire" at the required temperature. The increased airflow across the "hot-wire" acts as a cooling fan, lowering the resistance and requiring more current to maintain the temperature of the wire. The increased current is measured by the voltage in the circuit, as current increases, voltage increases. As the airflow increases the signal return voltage of a normally operating (MAF) sensor will increase. Testing 1. Using a multimeter, check for voltage by back probing the (MAF) sensor connector. 2. With the key ON, and the engine OFF, verify that there is at least 10.5 volts between the VPWR and GND terminals of the (MAF) sensor connector. If voltage is not within specification, check power and ground circuits and repair as necessary. 3. With the key ON, and the engine ON, verify that there is at least 4.5 volts between the SIG and GND terminals of the (MAF) sensor connector. If voltage is not within specification, check power and ground circuits and repair as necessary. 4. With the key ON, and the engine ON, check voltage between GND and SIG RTN terminals. Voltage should be approximately 0.34-1.96 volts. If voltage is not within specification, the sensor may be faulty. Removal & Installation (4.6L & 5.4L) 1. Disconnect the negative battery cable. 2. Release the air cleaner clamp and separate the air cleaner halves. 3. Remove the grommet from the air cleaner housing and slide the grommet down the hardness. 4. Remove the (MAF) sensor plate and (MAF) sensor from the air cleaner. 5. Detach the (MAF) sensor from the harness. 6. Remove the retaining nuts and remove the (MAF) sensor. 7. Installation is the reverse of removal.
What else can I help you with?
Where is the mass flow sensor located on a 2003 Lincoln navigator?
On a 2003 Lincoln Navigator : The Mass Air Flow Sensor is located between the engine air filter and the big engine air intake tube . It is INSIDE a plastic housing , you will see where the wires go in at the bottom of the housing
Where is the the mass air flow sensor located n a 1999 Lincoln navigator?
On a 1999 Lincoln Navigator : The Mass Air Flow sensor is between the engine air filter and the big engine air intake tube ( it is INSIDE the round shaped plastic housing )
Where is the mass air flow sensor in a 2003 Lincoln navigator?
In a 2003 Lincoln Navigator : ( the Mass Air Flow Sensor is between the engine air filter and the big engine air intake tube , it is INSIDE the round plastic housing , you will see where the wires go into the bottom of the housing )
Where is the mass air flow sensor located on a 2000 Lincoln Navigator?
First find your air filter on the insite of that black tube leaving your air filter towards the engine you will find your mass air sensor. On the bottom or top side of that tube you will see a electrical connector. Good luck.
Where is a mass air flow sensor on a 2001 Lincoln Navigator?
it is in the air filter box(round plastic tube at end of intake hose)
When you start your 1999 Lincoln navigator it won't idle unless you keep your foot on the gas especially when it is wet or cold?
the idle control sensor and then get a can of mass air flow cleaner and clen the mass air flow sensor which is located inside the rubber air hose it is metal and has two springs Do not touch the springs.
Where is the location of the MAFS on 2005 Lincoln Navigator?
The Mass Air Flow Sensor (MAFS) on a 2005 Lincoln Navigator is located in the intake air duct, just before the throttle body. To access it, you typically need to remove the air intake hose connected to the air filter housing. The sensor is usually secured by a couple of screws and may have an electrical connector attached that you'll need to disconnect before removal.
Where is the mass air flow sensor located on a 2002 Lincoln LS?
Look in your auto manual.
Where is the air intake sensor on a Lincoln ls 3.9?
The Mass Airflow Sensor (MAF) is located on the air intake tube directed after the air filter housing.
Where is the mass air flow sensor located on the 97 Lincoln continental?
On a 1997 Lincoln Continental : The Mass Air Flow sensor is between the cone shaped engine air filter and the engine air intake tube . It is INSIDE a round shaped plastic housing
Where is the mass air flow sensor located on a 1995 Lincoln Mark 8?
Standing in front of your car with the hood raised , look to the front left and you will see your air box , the mass air fow sensor is located on the bottom of the air box. You will need to remove the air box to get to the sensor .
Where is the mass air flow sensor on a 2002 Lincoln LS V8?
The 2002 Lincoln LS mass airflow sensor can be found on the air cleaner housing. The mass airflow sensor will be on the back side of the air cleaner housing.
