Q: engine sounds like its running faster than it is, like idle sounds fast but not

asked by on November 19, 2016

what makes engine sounds like running fast but isn't. runs smooth at idle only does it driving, starts easy doesn't die

My car has 157000 miles.
My car has an automatic transmission.

Engine idle speed is high Inspection $94.99 - $114.99 Get a Quote

Hi there:

High idle speed is commonly caused by a vacuum leak, problems with the EGR system or the idle control valve on our 2000 Chevrolet Silverado. The best way to determine which one specifically or other item is causing this issue you’re experiencing is to have a professional mobile mechanic complete an engine idle speed is high inspection.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car dies after about 30 minutes of driving
The ignition module failing after getting hot is the most likely failed part causing the stall. There can also be a problem with the fuel pump or sensors. I recommend seeking a certified mechanic, like one from YourMechanic, to come...
how long can it take to change valve cover gaskets on 2003 Lincoln aviator 4.6litre
Hi there. The book time calls for approximately 3.5 hours to complete the replacement of both valve cover gaskets. But this will vary by mechanic, but this is the average book time. If you need to have them replaced, consider...
Whining from timing area after water pump was replaced
Noises are often a point of contention in automotive repair. There is a phenomenon we humans all exhibit, mechanics included, where we become ultra sensitive to our cars after they have been worked on. I'm not stating this is what...
What causes my car to keep overheating?
Thank you for writing in! Typically the thermostat and water pump are the primary sources of overheating on a 1997 Toyota Corolla. However, since the fluid never left the reservoir, it could be caused by a blockage in the coolant...
Hot at idle and low when driving never stays in middle
Hi. This sounds like the water pump is not circulating the antifreeze in the engine. When a water pump stops circulating the antifreeze as well as it should the car tends to run hot when it is at idle and...
Car cutting out when slowing down
This may be related to a dirty or failing 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...
New Clutch won't engage
Hi there. Without being there to inspect your Nissan or knowing what replacement parts you used, it's difficult to pinpoint this issue remotely. You might want to verify that all replacement parts are OEM or compatible to your 720 first....
What would happen if the wrong catalytic converter was installed in my 2001 Toyota Camry
Hello. The wrong converter will cause your check engine light to come on and will cause you to not pass emissions. It can also cause some performance and efficiency issues over time. There are specific converters built for all vehicles...
My car has excessive vibrating sometimes. Is it the ball joints?
With over a quarter million miles on your car, it really could be anything. There are about a dozen moving parts in your car's front end that are subject to wear, including the ball joints. Any number or combination of...

Related articles

2012 Chevrolet Traverse vs. 2012 Toyota Highlander: Which One Should I Buy?
Large SUVs are a huge and broad market, with a range of different offerings from economy to luxurious. The majority of the SUVs and crossover SUVs offer decent gas mileage, plenty of room for friends and family to ride along...
2012 Chevrolet Malibu vs. 2012 Ford Fusion: Which One Should I Buy?
When you want a midsize sedan, you’re looking for something that will offer you the best fuel economy for the size as well as additional safety features that will keep your family safe while you’re driving across town or around...
The Top 5 Selling Cars in Alabama in 2012
2012 2012 was a great year in Alabama for auto manufacturing, but that wasn’t the only bright spot. Vehicle sales in Alabama were also robust in 2012. Nothing much changed in terms of the vehicle types that were most popular...