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Q: Truck jerks trying to change gear around 45mph

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When driving around 45mph i feel a jerk motion from the truck . like its trying to change the gear . would have to floor it for it to change gears . what can be wrong with it so it can stop?

My car has 160743 miles.
My car has an automatic transmission.

A: This may be a sign of a dirty or failing ma...

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this is dirty or faulty, this causes an imbalanced air/fuel load to be supplied to the motor which results in an over fueling or under fueling situation depending on the conditions. This type of inconsistent fuel supply to the motor may cause a hesitation, loss of power, a jerking reaction, potentially a bit of black exhaust smoke and typically a strong smell of fuel when this sensor is malfunctioning. When this is not working properly, you may also notice a strong smell of fuel. I would suggest having a professional from Your Mechanic come to your home to diagnose your mass air flow sensor.

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