Q: Q: Car hesitates when accelerating.

asked by on

today wife was driving the car and said when she accelerates the car jerks. But then when at a steady speed it is fine.

My car has 186000 miles.
My car has an automatic transmission.

This is a common symptom of a failing mass air flow sensor. This is a unit that monitors the air and fuel mixture prior to being injected into the motor. When this is not working properly, this causes an imbalance in the air/fuel ratio which will cause the car to hesitate as you describe.

If you’d like to get this fixed, I would recommend having an expert from Your Mechanic come to your home to diagnose the hesitation while acceleration and help you fix it accordingly.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Car hesitates when accelerating.

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: Check engine light flashing, sucking fuel, procrastinating when accelerating...

This is a very odd set of symptoms. I would suggest ruling out any fuel-related issues as the poor fuel economy and lack of power could be related to faulty sensors like the throttle body sensor, mass air flow sensor,...

Q: car crank not start, 2004 BMW 745i

The code you listed, P1727 indicates that the engine speed sensor is not providing a signal to the computer. Without knowing the position of the crankshaft, the ECM does not know when to inject fuel or when to ignite a...

Q: Why is there metal shavings in my oil filter but my engine isn't making a noise?

You can send a sample of the oil and/or the foreign material to a laboratory and they will perform an analysis identifying the type of metal which could give you a clue as to location. As far as the connection...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...