Q: Car bucks while driving

asked by on December 26, 2016

When cruising at a steady speed, the car bucks. I'm not losing any RPMs

My car has 99000 miles.
My car has an automatic transmission.

Hello There! It sounds like you may have a dirty or faulty mass air flow sensor. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays vital information to the ECM which uses this to make adjustments to fuel supply to the motor. A dirty or faulty sensor can cause 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.

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

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

I already know that I need a CV Shaft/Axle replacement on the front driver side. I got a quote but seems high and wondering how much it would cost.

Billing question sent to CS for the cost of part and labor for the replacement of a CV Shaft/Axle on the front driver side of a 2008 Toyota

When the weather is nice outside, the car start fine. When it is cold, the car refuses to start until I try it several time

Hello, the first step in resolving this problem is to determine if there are any problem codes set by engine management - even if the Check Engine light is not illuminated. Most auto parts supply stores will check this for...

08 camry hybrid. Hybrid battery seems to test ok, I removed the entire pack and load tested each cell, but i still get dash light

Hi there. Typically when a warning light is illuminated on the dash, it is due to an error code being created and stored in the ECU. In most cases, in order for the error light to go away, it needs...

Related articles

How to Use Intelligent Parking Assist in a Toyota Prius
The The Toyota Prius is an innovative vehicle packed with features that make your driving experience smoother and easier. One such feature is the Intelligent Parking Assist which helps a driver to properly center the Prius in a parking spot....
The Best Used Cars to Buy If You’re an Interior Designer
As As an interior designer, you need to transport a great many different items, including fabric, paint and wallpaper samples and sometimes even furniture items. You probably don’t handle overly large loads very often, and when you have to, you’ll...
How to Buy a Good Quality Mass Airflow Sensor
A A faulty mass airflow meter can cause myriad problems, such as rough acceleration and idling, stalling and hesitation. It may be difficult to diagnose since the failure of a number of parts may mirror these symptoms. The same symptoms...