![]() Here are five symptoms of a bad MAF sensor : Drivability issues that impact power, starts, and acceleration are among the most common. Why Cleaning your MAF Sensor is ImportantĪs you’ve probably already gathered, a bad MAF sensor doesn’t always allow for the correct fuel injection calculation, which may lead to larger issues with your vehicle. ![]() The analysis from your MAF sensor is used to achieve a good fuel ratio by preventing too much air from getting into the engine when there is little fuel. In a perfect world, all gasoline engines would run the ideal air-fuel mixture of 14.7 parts air to 1 part fuel. This target mixture, which is referred to as the stoichiometric air-fuel ratio, is a compromise between optimum fuel economy and optimum power output. Their job is to monitor, make adjustments, and optimize performance. This is the brain of your car, receiving and sending information about airflow and gas composition through its computers and processing fuel consumption rates for each driving mode or engine setting accordingly.īy adjusting air-fuel ratios (AFRs), the ECU coordinates all aspects - from accelerating to heating!Īn engine’s AFR is a balance between the amount that’s burned and what isn’t, determining how much oxygen will reach your engine’s combustion chambers and helping to create power for vehicles with manual transmissions or Automated manuals.ĮCUs optimize these ratios for different types of vehicles. Most modern cars come equipped with an electronic control unit (ECU). Immediately after analyzing the air flowing into the engine, the MAF sensor feeds that data analysis to the engine computer for efficient fuel consumption. This is all determined during the combustion process. You’ll see it installed between the intake manifold of the engine and the air filter it is often considered the most critical component of an electronic fuel injection system!īy measuring both air density and temperature, your vehicle’s electronic control unit can then calculate how much fuel should be added to achieve the correct air-fuel ratio. The mass air flow sensor is a device that measures the air mass flowing into the engine intake. Over time, dust and oil contamination can reduce MAF sensor performance, adversely affecting driveability and increasing exhaust emissions. However, keeping this little device clean is important, as MAF sensors are critical to the proper operation of your vehicle’s fuel injection system. Regular use will restore horsepower, reduce rough idle, decrease hesitation and pinging and improve gas mileage.Like most people, you probably don’t think about your vehicle’s mass air flow sensor very often. Use only the original Mass Air Flow Sensor Cleaner from CRC Industries to safely clean the delicate components of the sensor. If the plastic degrades or warps, the MAF hotwire can shift and malfunction, resulting in expensive repairs. However, these aggressive cleaners can be damaging to plastic, which most MAF sensors are housed in today. Often, technicians will try to use throttle body, carburetor, or brake parts cleaners to clean sensitive MAF sensor components. Reassemble the MAF and allow to dry thoroughly before restarting the engine. Be sure to spray all sides of the MAF sensor and clean all wires and connectors. Keep the end of the straw 4 to 5 inches from the hotwire. Be careful not to let the straw, or anything else come in contact with hotwire. ![]() Using the straw attachment, apply 10 to 15 short bursts of CRC Mass Air Flow Sensor Cleaner to the hotwire or the hot plate. Place a towel under the MAF to catch any run-off. It is recommended that you remove the sensor for best cleaning, but it’s not absolutely necessary. Remove the air filter to gain access to the MAF sensor located between the air box and the throttle body. Always wear gloves and eye protection, and insert the straw into the nozzle before an application. Use CRC Mass Air Flow Sensor Cleaner with the engine off. The original Mass Air Flow Sensor Cleaner from CRC Industries is a unique precision cleaner specifically developed to clean sensitive components in MAF sensors without damaging or degrading plastic or painted surfaces. Your engine may also be running rich and producing excess emissions. You may experience a loss of power, stalling, rough idle. Signs of a dirty MAF sensor could be a check engine light. This can cause inaccurate readings and negatively affect the air to fuel ratio. The MAF sensor wire gets dirty with accumulated debris, oil, air filter fibers, dust and pollen. This is information the computer uses to determine how much fuel to inject into the engine for combustion as air enters the cylinders. Most fuel-injected vehicles are equipped with a mass air flow sensor, or “MAF” sensor to measure the amount and density of air entering the engine.
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