Skip the auto shop - Our mechanics make house calls

Q: Higher rpm than usual

asked by on

At highway speeds my car is going about 500 rpm over what it usually runs and its giving a little jerking of the car. Not exyreme jerking just enough to where i feel it. What could this be?

My car has 210000 miles.
My car has an automatic transmission.

This may be a sign of a 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 fails, this can cause an imbalanced air/fuel load to be supplied to the motor which often times results in the engine starving for air or fuel. This is what causes the hesitation or loss of power you describe. This can also cause the engine to struggle to idle for the same reason. I would suggest having a professional from YourMechanic come to your home to diagnose and replace this sensor.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuel rail once went bad. Driver side spark plugs good other side black. Fires up idles a few secs then shuts down.

You need to have the fuel pressure checked to see if the pressure holds steady when the key is cycling on and off. The pressure regulator may be leaking fuel into the intake flooding the three cylinders with fuel. Have...

Q: crank shaft sensor issue

Hello. This can be caused by a number of different things. I usually start by scanning the computer for codes. This would give me a good idea of what is going on.If there are not any codes then I check...

Q: Car is jerking, and Check Engine Light flashes

When the Check Engine Light is flashing, it is telling you that the engine has a problem that may be causing damage to your catalytic converter assembly. The most likely problem is an engine misfiring from an ignition problem, such...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.