Q: Car jerking forward when stopped.

asked by on December 16, 2016

When I'm at a complete stop when my foot is on brake it feels like car is jerking forward. I had my brakes checked a month ago and they said I needed brake fluid and that was it . When driving the vehicle feels like has no umph in it .

My car has 73000 miles.
My car has an automatic transmission.

This may be related to a dirty of failing idle air control valve. This is a unit that monitors the air intake into the motor as it is mixed with fuel prior to being injected into the motor. This information is relayed to the vehicle’s ECU which then makes adjustments to ensure the proper air/fuel ratio. When this is not working properly, this may cause an unbalanced load of fuel to be injected into the motor resulting in a fluctuating idle. The idle air control valve also helps to transition the motor from higher RPM’s back down to a slow idle without causing the motor to stall. When this not working properly, you may notice an erratic idle which may cause the vehicle to lurch forward when sitting at a stop light as you describe. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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

What others are asking

The transmission went out on my 2010 GMC Terrain, at 55,000 miles, with no warning. Last year, under a recall, I had the timing fixed.

Hi there. With the limited detailed information that is provided about your situation, I can input that the transmission may have had a fluid leak or the vehicle was used for pulling a trailer that was overloaded. The transmission in...

car shaking/vibrating when idle

Hello. This sounds like potentially a failing idle air control valve or potentially a misfire. The idle air control valve regulates the air intake into the engine as it is mixed with fuel prior to being injected into the engine....

How do I use shuffle mode when playing music off of a USB drive?

Shuffling songs is the same on your USB drive as it is when you use an iPod with a USB cable: Rotate the Menu or Menu/Sel knob until it highlights Shuffle Songs, then press the knob. Use the Menu...

How do you clear the MyKey system?

While the MyKey® system on your car can provide enhanced safety and peace of mind, it may be necessary to clear it eventually. After all, the point is to teach younger drivers responsible habits. Once they’ve learned, you should clear...

My car idles roughly and wants to die when I give it gas what could this be?

With this kind of engine issue, I would imagine that your Check Engine Light is on, indicating that the built in diagnostics have logged and error and a diagnostic trouble code. It will be important to know these codes to...

2008 jeep patriot. Throttle body and traction control light are on and very low power

Hi There, The throttle body light may come on when the throttle control motor is not working properly. The throttle control motor is what opens and closes the throttle blade inside the throttle body. This may also suggest you have...

How do I permanently disable the rear view monitor system?

Your car’s rear view monitor system is designed to provide you with greater safety in situations where you need to see behind the car when backing up. However, it can be disabled both temporarily and permanently (it can be enabled...

P0786 code ford glaxay, gear shifting jurk or slip

This is a common code related to the MAP sensor. This can happen for a variety of reasons such as something as simple as a dirty mass air flow sensor which could be causing inaccurate fuel trim adjustments to be...

Smaller serpentine belt shredded and pieces went into the crank shaft Tried to start timing jumped. How do I fix? 05' kia op 2.4L

The KIA 2.4 liter motor is what is called an interference motor and this means it will bend valves if the timing belt breaks or jumps timing. You will need to have cylinder head removed and bent valves replaced if...

Related articles

A Buyer's Guide to the 2012 Lexus GS450h
The The 2012 Lexus GS450h is for those who want to drive a hybrid, but would prefer to still enjoy a luxurious and safe ride. Fortunately, as this sedan proves, going the hybrid route doesn’t have to mean you lose...
A Buyer’s Guide to the 2012 Jaguar XF
The The Jaguar name alone represents luxury, performance and prestige in the world of high-end vehicles. The XF was completely retooled in 2009, a sign of the premium carmaker’s efforts to draw in younger consumers and attract a whole new...
A Buyer’s Guide to the 2012 Dodge Journey
The The 2012 Dodge Journey is easy to drive, and it’s not so large that you will have a difficult time parking it. It’s an attractive vehicle that has the power you need whether you are hauling a full carpool,...