This is when having a bad mass air flow sensor maf becomes a problem. When the flow of air enters the fuel injection system of the engine the mass air flow sensor will analyze how much air is flowing in there.
In such a scenario the ecu will sense the drop in engine vacuum first and then using other sensors will decide if more fuel is required.
Bad mass air flow sensor. Quick test to tell if mass air flow sensor is bad or dirty which could be causing your car or truck to run bad or keep cutting off. The mass air flow sensor measures the amount of air entering the engine. Measuring air mass is critical in calculating how much fuel to add to achieve the correct air fuel ratio afr.
A faulty maf sensor can cause your vehicle to run too rich or run too lean. Shouldn t the mass air flow sensor dictate the voltage going out to the ecm. Make sure your mass air flow sensor is clean.
The mass air flow sensor measures the air mass flowing into the engine intake. It takes account of the air flow and converts it to an electrical signal sent to the ecu. If your check engine light is on you could have a bad mass air flow sensor.
A maf sensor is usually placed in line immediately after the air filter and takes a reading of how much air is entering the engine. Check the terminals for a loose wire or bad connection. The ecu sees this reading and.
Because the maf is a primary input to your car s computer for fuel control more on that later the sensor can cause several noticeable symptoms when it fails. My mass air flow sensor on an 88 camaro 2 8 reads 5 volt reference between signal and ground while running and unplugged on the ecm side at idle. The ideal afr is 14 7 1 14 7 pounds of air to 1 0 pounds of gasoline but real world afr varies.
The mass air flow maf sensor part of your vehicle s electronic fuel injection system is responsible for calculating the total amount of air entering the engine. The main work of a mass air flow sensor sends important data to the engine control unit or the ecu of the vehicle that helps the unit to process and enable the the system to correctly send the correct amount of fuel to the engine. Mass air flow sensor symptoms.
The mass air flow sensor shortly also known as maf is a part of your vehicles engines electric fuel injection system. The mass air flow maf sensor is an important component which the engine control unit depends on. You ll notice if the tailpipes eject black smoke or when the engine runs rough or backfires.
It will then relay this information back to the engine control unit. Auto repair shops hate this video. A bad mass air flow sensor won t reliably measure the amount of air coming in through the air filter resulting in a delay in the fuel delivery during sudden acceleration and a temporary lack of power.