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Q:what does this part do. Also what trouble is with this before going out..
A:This mass air flow sensor is used to find out the mass flowrate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. The most reliable early symptom of a failing or failed MAF is the illumination of the check engine light on the instrument panel. Because the MAF is instrumental in maintaining proper balance of air and fuel inside the engine, MAF failure can cause a range of engine performance problems. These may include low gas mileage, shuddering, stalling, knocking or pinging. Sometimes the MAF will begin malfunctioning because it is dirty. Although the air that passes through the MAF is filtered, microscopic particles will still get through and accumulate on the sensor. Most of the time, this buildup won't be significant enough to affect the MAF, but severe buildup can cause interference. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.