Skip the auto shop - Our mechanics make house calls

Q: Cutting off when coming to a stop

asked by on

Went to a mechanic and said it was the throttle body but first we put gas in the car and it started cutting off when coming to a stop before it ran fine we got a 2000 throttle body and the mechanic put it in and said it would still cut off bcz it needs a couple of days to reprogram does that sound right?

My car has an automatic transmission.

Unfortunately, without the make and model of your vehicle, this would be tough to diagnose. Generally, when the engine dies when coming to a stop, this is commonly related to what is known as an idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer which will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed. This is all controlled by the idle air control valve. When the engine RPM drops below the normal range of 750-800 RPM (for most cars), this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and repair your idle air control valve.

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: starts and dies immediately

This may be related to many different things, but suggests that there may be a fuel delivery issue such as failing injectors, low fuel pressure or a faulty idle air control valve. The idle air control valve is located on...

Q: car completely died going down road now won't start

Hello there, without knowing your make and model I can only provide a very basic answer. Touching the ignition switch wires together to start the car will cause long term damage and can damage the wiring harness. Many common faults...

Q: Car dies when put into gear

Hi there. From the description you have given, of your vehicle's engine dieing, it could be several things. Assuming, there is no Check Engine Light on, leads me to believe, the vehicle computer is not recognizing the fault. It could...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.