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2021 trax mpg8/11/2023 Checking the tire pressure and have the alignment checked on regular basis can help prevent this problem.ĭefective Fuel Pump: Fuel delivery issues can drastically affect fuel efficiency. Misaligned Tires: Tires that are low or out of alignment can lead to a drop in fuel efficiency. A dirty airflow sensor will degrade fuel efficiently and lead to a rough idle and even stalling as the problem progresses. It delivers that information to the vehicle's computer, which crunches the numbers and then delivers the proper amount of fuel to the air in the vehicle. Malfunctioning Mass Airflow Sensor: A mass airflow sensor detects the amount of air coming into the fuel injection system. This can lead to a lack of power as well as a big decline in fuel efficiency. If they are dirty or working incorrectly, it can cause the engine to misfire, leading to poor engine performance. As it progresses, the injectors may have to be replaced.īad or Dirty Spark Plugs: Spark plugs ignite the fuel in the combustion chamber. If caught early, simply cleaning the injectors can solve the problem. This can lead to a drop in fuel efficiency as well as slow acceleration and the car not having enough power. Over time the fuel injector system can become clogged. It can also lead to failed emission tests and a rough idle.ĭirty Fuel Injectors: Fuel injectors spray fuel into the cylinders where it is mixed with air and ignited. If the sensor is dirty or failing it can lead to a drop in miles per gallon. The data is used by the vehicle computer to adjust the amount of fuel entering the engine. Service type Car is getting worse gas mileage Inspectionĭirty Oxygen Sensor: An oxygen sensor measures exactly how rich or lean the exhaust gases are when they leave the combustion chamber.
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