What would you like to do?
\n. \n Answer \n. \n. \nI assume you wish to reset your ECU (computer). It really depends on the year. On my 97 626: Remove negative battery cable, depress brakes for 1…0-15 seconds(to ensure power is completely depleted). Reconnect Battery. This will reset your computer. you may need to put a code into a factory installed radio (to make the radio work again).\n. \nPlease note: Your ECU needs to "re-learn" how to run your engine, your car may run rough for awhile as the ECU "learns" how to operate your engine. It may take 40 miles or so, its a good idea to do both city and highway driving to make sure the ECU sets itself properly.
Answer directly on top of the throttle body intake
Its in the air Filter box of your car. Stop using K&N The MAF sensor monitors the air flow into the engine and sends that info to the ECM.
unplug it, if there is no change in how the engine runs it may be bad. the only for sure way is to test it on a sensor tester. There are some MIL codes that will lead to a f…aulty MAF p0102 maf signal low input p0103 MAF signal high p1100 maf circuit output low during self test p1101 maf sensor circuit output low during self test A few that arent so obvious Lean or rich codes fuel trim codes serious lack of power when accelerating lousy gas mileage rough idle or stalling Look for vacuum leaks between the maf and throttle body and dirt or fuzz on the two wires on the sensor itself, these two items are the easiest to cure. Clean the sensor with electrical contact cleaner or maf sensor cleaner, but dont touch the fragile wires, they break easily.
Ford Engines: You MAFS (Mass Air Folw Sensor) depending on if you car is a z-tec or duratec would be right in front of you if you open the hood (assuming it's a duratec)…. It is connected to you MAF tube. If you follow your intake it's the tube right before it coonects to your plastic intake manifold. On the MAF tube is a little plug that is your sensor.
The mass air flow (MAF) sensor measures the mass of the air entering the engine. Because air mass varies with air temperature (cold air is denser than warm air), measuri…ng air mass provides the PCM with a very acurate way of determining the correct amount of fuel to obtain the ideal fuel/air mixture. - Haynes Repair Manual #36071
The 2003 GMC ambient air temperature sensor is located on the bottom of the drivers side mirror. If you look up at the bottom of the mirror you will see the sensor.
located in the front right side conected to the air filter...
on the driver side attach to the air filter box
It senses the amount of air being drawn into the engine and communicates with the computer to adjust fuel levels accordingly.
on top of heater housing
it is attached to the throttle body the left side of it should have i think 3 wires coming out of it
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 calculat…e 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.
does not have one just a map sensor
The MAF sensor would be found in the snorkel between the air filter box and the throttle body.
air mass flow sensor is fixed near inlet manifold.
GMC K3500 didn't have a MAF sensor in 1992.