Q: Car stops accelerating, motor stalls, what can I do?

asked by on

My 2010 Ford Fusion ran fine for the first 70,000 miles but now has started to randomly decelerate when my foot is still on the accelerator. This is a serious problem. The car stalled out at a couple of times when I stopped, which I thought was unusual for an automatic. But, I didn’t think anything serious was happening. Now I think those things are related and something is broken that is making the accelerator not work. How can I properly diagnose this problem?

Before the advent of modern computer controls, the driver of a vehicle was in direct connection with many of the systems they were controlling. Power accessories (locks, windows, etc) were directly linked to the switches at the driver’s finger tips. The accelerator pedal used a cable to transfer the driver’s force to opening the throttle blades. In the increasing push for efficiency, modern vehicles use sensors and actuators to communicate the driver’s requests, removing the direct links. In the event of a malfunction, the output performed may be vastly different what the driver requested. I believe the best strategy given your symptoms would be having a certified technician inspect your Fusion, and look for signs of failures in the electronic throttle control (ETC) system. Any faults will almost certainly be logged as diagnostic trouble codes, and the technician can begin diagnosis from there. Because the ETC system is responsible for countless cycles of opening and closing the throttle blade, it wears out just like any other part. Thankfully, the parts in this system are relatively inexpensive, and if properly diagnosed, can be changed in less than an hour.

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. Car stops accelerating, motor stalls, what can I do?

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: Steering wheel shakes, light came on power steering assist failure 2010 Ford Escape

Hi there - this behavior, sometimes called "phantom steering shake" is often due to a steering torque sensor in the steering column. This device sense how much effort is being put into the steering wheel to make a turn. This...

Q: Brake Fluid Leak On Front Driver Side

This may suggest you have a leak coming from your brake master cylinder or the lines running to it. As you may know, when there is a significant loss of brake fluid, you may notice a spongy brake pedal or...

Q: Where can you find the auxiliary power outlets?

You have two auxiliary power outlets in your car that allow you to charge things like cell phones and tablets, or even plug in a power strip or a portable DVD player. You’ll find them located here: The front...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...